Biocompatible Molybdenum Complexes Based on Terephthalic Acid and Derived from PET: Synthesis and Characterization

Asian Journal of Applied Science and Technology (AJAST)
Volume 6, Issue 3, Pages 25-34, July-September 2022
ISSN: 2456-883X www.ajast.net
25
Biocompatible Molybdenum Complexes Based on Terephthalic Acid and Derived
from PET: Synthesis and Characterization
Cesar E. Castañeda-Calzoncit1
, Denis A. Cabrera-Munguia1*
, Jesús A. Claudio-Rizo1
,
Dora A. Solís-Casados2
& Claudia M. López-Badillo3
1
Materiales Avanzados, Facultad de Ciencias Químicas, Universidad Autónoma de Coahuila, Blvd. Venustiano Carranza 935,
República, 25280 Saltillo, Coahuila, México. Email: dcabrera@uadec.edu.mx*
2
Centro Conjunto de Investigación en Química Sustentable, UAEM-UNAM, carr. km 14.5 unidad San Cayetano
Toluca-Atlacomulco, Toluca, Estado de México, México.
3
Materiales Cerámicos, Facultad de Ciencias Químicas, Universidad Autónoma de Coahuila, Blvd. Venustiano Carranza 935,
República, 25280 Saltillo, Coahuila, México.
DOI: http://doi.org/10.38177/ajast.2022.6304
Copyright: © 2022 Cesar E. Castañeda-Calzoncit et al. This is an open access article distributed under the terms of the Creative Commons Attribution
License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Article Received: 22 May 2022 Article Accepted: 24 July 2022 Article Published: 16 August 2022
1. Introduction
Molybdenum (Mo) is the only transition metal from the second row of periodic table that is required for bacteria,
plants, animal, and humans [1], since molybdenum takes part of the metabolism of carbon, nitrogen, and sulfur
compounds, [2] and due to its abundance in the oceans in the form of the soluble molybdate ion (MoO4
-2
) is easily
uptake by the living organisms [1, 2]. In the human body, Mo is a trace element that has acts as cofactor in the form
of enzymes like xanthine oxidoreductase, mitochondrial amidoxime, aldehyde oxidase, and sulfide oxidase [3, 4].
However, to obtain biologic activity Mo must be complexed to protein compound to form molybdenum cofactor
(Moco) [4].
On the other hand, organic ligands constituted by carboxylic groups are biocompatible, due to their great polarity
they can be easily removed from animal by urine and feces [5]. Specifically, terephthalic acid (BDC) has been used
in the construction of Metal-Organic Frameworks (MOFs), being a hard base mixed with hard acid such as Cr+3
,
Al+3
, Fe+3
, and Zr+4
leading to the water stable MOF series MIL and UiO [6, 7].
Also, polyethylene terephthalate (PET) is a non-biodegradable polymer with high resistance to degradation by
hydrolytic cleavage of chemical bonds, but it can be depolymerized by glycolysis obtaining as a main product
bis(2-hydroxyethyl) terephthalate (BHET) using acid Lewis catalyst [8]. In a previous work, BDC and BHET were
used as organic ligand to form coordination polymers with aluminum ion (Al+3
) obtaining outstanding
biocompatible properties in the metabolism of fibroblast [9], also these compounds were used as active ingredients
in the formulation of a gel based on collagen to heal skin chronic wounds such as burns, venous ulcer, and diabetic
neuropathy [10].
ABSTRACT
Metal-organic molybdenum complexes were synthesized by the hydrothermal method using ammonium heptamolybdate as the metallic source, and
as the organic ligand terephthalic acid (BDC) or bis(2-hydroxyethyl) terephthalate (BHET), obtained via glycolysis of poly(ethylene)terephthalate
(PET). The BDC-Mo and BHET-Mo complexes were characterized by XRD, N2 physisorption, TGA, ATR-FTIR, SEM, XPS and their in vitro
biocompatibility was tested by porcine fibroblasts viability. The results show that molybdates (MoO4
-2
) are coordinated to the carbonyl functional
groups of BDC and BHET by urea bonding (-NH-CO-NH-) which is related to their high biocompatibility and high thermal stability. These organic
molybdate complexes possess rectangular prism particles made up of rods arrays characteristics of molybdenum oxides (MoO3). The organic
complexes BDC-Mo and BHET-Mo do not show to be cytotoxic for porcine dermal fibroblasts growing on their surface for up to 48 h of culture.
Keywords: Molybdenum complexes, Terephthalic acid, bis(2-hydroxyethyl) terephthalate, Cell viability, Biocompatibility.

26
In the present work, it is proposed the synthesis of two molybdenum complex based on ammonium heptamolybdate
(AHM) and BDC or BHET as organic linker, where BHET was previously obtained from PET depolymerization.
The hydrothermal process was employed as the synthesis method using water as a solvent to assure the
biocompatibility of the compounds, avoiding traces of organic solvents. The crystal, textural, chemical structure,
thermal stability and biocompatibility of BDC-Mo and BHET-Mo were systematically studied obtaining
molybdenum-based complexes that crystalize in the form of rectangular prism composed of rods arrays, where
fibroblast can live up to 48 h without affecting their metabolism, as it is shown in the fluorescence images with
calcein (Fig.1), and thus these novel materials could be potential candidates for biomedical applications in tissue
engineering and controlled drug delivery.
Fig.1. Synthesis of molybdenum complexes and fibroblast proliferation using Live/Dead assay
2. Methods
2.1. Synthesis of molybdenum complexes
The BDC-Mo and BHET-Mo complexes were synthesized mixing 5 mmol of ammonium heptamolybdate
((NH4)6Mo7O24.4H2O, AHM) and 17.5 mmol of terephthalic acid (HOOC-C6H4-COOH, BDC) or 17.5 mmol of
bis(2-hydroxyethyl) terephthalate (HO-C2H4-OOC-C6H4-COO-C2H4-OH, BHET), the latter was obtained
previously by the depolymerization of PET bottles, the glycolysis procedure was described somewhere else [9].
The metallic precursor and the organic ligand were dissolved and mixed in 50 mL of distillated water, the solution
was put into a Teflon-lined steel autoclave and heated up to 120ºC for 72 h. The hydrothermal reactor was opened
containing a blue-colored suspension that was filtrated under vacuum, obtaining a whitish precipitate which was
washed with distillated water, and it dried at 80ºC during 12 h.

27
2.2.Physicochemical characterization
The XRD diffractograms of BDC-Mo and BHET-Mo complexes as well as their precursors were acquired in a 2θ
range from 5º to 40º with a Cu Kαx ray source (λ=1.540 Å) using a SAXS-Emc2, Anton Paar diffractometer. The
infrared spectra of BDC-Mo and BHET-Mo materials were acquired with a resolution of 16 cm-1
from 4000 to 600
cm-1
using Perkin Elmer Frontier equipment.
The X-ray photoelectron analysis (XPS) of BDC-Mo and BHET-Mo was done employing a JEOL photoelectron
spectrometer model JPS-9200 equipped with a monochromatic Mg X-ray radiation (300 W, 15 kV and 1253.4 eV).
The powders of materials were deposited on a conducting scotch tape and located in Al tapes on stainless steel
sample holders, which remained in a pre-analysis chamber until a pressure of 10−3
mbar was achieved before
entering the analysis chamber. Survey spectra were recorded from 0 to 1100 eV at constant pass energy of 100 eV,
onto 900 µm2
of analysis area; narrow spectra of C1s, O1s, N1s and Mo3d regions were recorded in the constant
pass energy mode at 20 eV, dwell 100 and 10 scans at least, Specsurf version 1.8.2 was used for acquisition. Origin
v.9.0 was used for data analysis, the charge correction was adjusted with carbon signal C1s 284 eV. A Shirley type
background was subtracted as baseline from the spectra and signal was deconvoluted using Gaussian curves to
determine binding energies of the different element core level. NIST database was used to identify the
corresponding element of the measured binding energies.
The textural properties such as surface area and mean pore diameter of BDC-Mo and BHET-Mo complexes were
analyzed by N2 adsorption using the BET method. The nitrogen physisorption experiments were carried out in a
Quantachrome Autosorb iQ instrument, with a previous outgassing of the samples at 200ºC during 12 h. The
thermal properties of materials were measured in a TGA-4000 Perkin Elmer thermoanalyzer, where 5 mg of sample
were heated since room temperature until 800ºC with a heating rate of 20ºC/min, and a N2 flow of 20 mL/min as
inert atmosphere. The SEM micrographs were acquired in a JEOL JSM-6510LV scanning electron microscope.
2.3. Analysis of in vitro biocompatibility
The viability of porcine fibroblasts growing on water suspensions of molybdate complexes was assessed.
Fibroblasts suspension in DMEM culture medium was added to every well (50,000 cells) that contain every
molybdenum complex in a water suspension and the control (phosphate buffer solution (PBS 1X)), these were
incubated for 24 and 48 h. The cell viability was determined by the active metabolism of these cells to transform
MTT salts into formazan with respect to control. The MTT (1% w/v) was added to wells with materials and
controls, and afterward, the cells were kept up under culture conditions for 3 h at 37 °C. At that point, the medium
was tapped, the blue formazan was diluted in isopropanol, and the absorbance of the solutions was estimated at 560
nm, using a Thermo Scientific Multiskan Sky spectrophotometer. The absorbance of generated formazan by cells
growing in the control (PBS 1X) is equal to 100% of viability, thus the cell viability ratio was calculated dividing
the obtained absorbance by complex water suspension between the control absorbance.
3. Results and Discussion
Fig.2a shows the diffractograms of BHET, (NH4)6Mo7O24.4H2O and BDC. The BDC sample exhibits the peaks
17.3°, 25.1°, and 27.8° at 2θ that correspond to the double hydrogen bonded molecular chains of BDC leading to

28
the form of plates and needles [11]. While the XRD of BHET shows characteristic signals at 2θ=10.2°, 16.3°, 21.1°,
23.3°, and 27.4° typical of crystals in the form of needles [12]. The XRD pattern indicates intense signals at
2θ=11.9°, 12.2° and 12.60° which are in line with the ICDD PDF card 21-0571 related to molybdenum oxide
ammonia hydrate confirming the crystal structure of ammonium heptamolybdate.
Fig.2b depicts the XRD patterns of BDC-Mo and BHET-Mo, most of the characteristic peaks are associated to the
crystal structure of ammonium tetramolybdate ((NH4)2Mo4O13, ICDD PDF card 80-0756) with intense signals at
2θ= 12.3°, 13.7°, 14.7°, 25.6°, 26.9° y 30.4° related to the planes (0 2 1), (1 1 1), (0 2 2), (2 1 2), (0 4 3), and (1 0 6),
respectively [13]. The characteristic diffraction peaks of BDC with a smooth left shift of 0.1° appear in both
BDC-Mo and BHET-Mo indicating the coordination bonding between the ligand and molybdenum octahedrons.
Also, small peaks at 11.3°, 18.9°, 21.8°, and 23.5° indicate the presence of the biuret crystal phase (NH(CONH2)2)
[14]. In addition, the crystal data of both BDC-Mo and BHET-Mo is provided in Table 1, these data were obtained
with the software FullProof Suite ToolBar using DicVol04 tool by selecting the 20 most intense peaks, it was
obtained that Mo-BDC and Mo-BHET possess a monoclinic crystal system typical of molybdenum complexes [15,
16] with a space group P 2/m.
Fig. 2. XRD patterns of (a) precursors and (b) molybdenum complexes
Table 1. Crystal data and textural properties of molybdenum complexes
PROPERTY BDC-MO BHET-MO
Crystal system Monoclinic Monoclinic
Space group P 2/m P 2/m
a (Å) 19.2875 13.7498
b (Å) 15.3559 14.3278

29
c (Å) 7.8349 10.6793
α (°) 90 90
β (°) 91.17 107.01
γ (°) 90 90
Volume (Å3
) 2320.02 2011.80
BET surface area (m2
/g) 1.592 2.486
BJH pore diameter (nm) 1.716 1.388
Pore volumen (cm3
/g) 0.003 0.008
The SEM images of BDC-Mo and BHET-Mo are shown in Fig.3 evidencing that molybdenum complexes present
rectangular prism particles which are typical of molybdenum oxides (MoO3) generating rods arrays [17], and other
complexes based on molybdenum and imidazole as ligand [18, 19]. The only difference between BDC-Mo and
BHET-Mo is that the rectangular prism particles are more flattened in BHET-Mo than in BDC-Mo, thus obtaining
more rods arrays in BHET-Mo, this correlates with the cell angles calculated (Table 1).These results also imply the
major surface area and volume pore for BHET-Mo in comparison with BDC-Mo, however BDC-Mo shows a
slightly greater pore diameter than BHET-Mo, this being typical for microporous materials (Table 1).
Fig.3. SEM micrographs of (a) BDC-Mo and (b) BHET-Mo
The ATR-FTIR spectra of the BDC and BHET precursors are shown in Fig.4a. Both precursors exhibit similar
bands at 3200-3000 cm-1
, 1570 cm-1
, and 1400 cm-1
that are related to the C-H bonds and the C-C stretching
vibrations of the benzene ring [14, 20]. Also, there are two bands at 1280 cm-1
and 1720 cm-1
associated to the
vibration of C=O of the acyl group [14, 20]. The BDC shows an additional broad band at 940 cm-1
that belongs to
the bending vibration of -OH bond from the carboxyl group [14]; while BHET depicts additional bands at 1450
cm-1
and 3430 cm-1
that correspond to methylene bonds (-CH2) and hydroxyl bonds (-OH), respectively [20].

30
Fig.4b plots the FTIR spectra of BDC-Mo and BHET-Mo complexes which are very similar. Both spectra indicate
broad bands (2900-3300 cm-1
) related to the stretching region of N-H and O-H bonds [14]. The band at 1720 cm-1
from BDC and BHET suffers a small shift to lower wavenumber at 1680 cm-1
obtaining a broad band, indicating the
carbonyl stretching in molecules containing the NH-CO-NH group, this shift is attributed to the coordination
through the oxygen atom with a metal to form complexes [14], this implies that carboxylic groups of BDC and
BHET ligands are losing hydroxyl groups forming coordination bonds, which explains the loss of the characteristic
band of hydroxyl groups of BHET in BHET-Mo complex. Also, the bending vibrations of the C=O bonds are found
as small bands at 630 cm-1
and 675 cm-1
evidencing that the coordination bonding in BDC-Mo and BHET-Mo is
mainly formed between molybdenum ions and carbonyl groups of BDC and BHET ligands [14]. In addition, the
bands at 1570 cm-1
, 1400 cm-1
and 1280 cm-1
are attributed to the C-H bonds, C-C stretching vibrations of the
benzene ring, and the vibration of the C=O of the acyl group. The bands at 884 cm-1
and 739 cm-1
represent the
stretching vibration of the Mo=O terminal group, and to the flexural vibration of the Mo-O-Mo group, respectively
[13].
Fig.4. ATR-FTIR spectra of (a) precursors and (b) molybdenum complexes
Fig.5 depicts the high resolution XPS spectrum of O1s of molybdenum complexes with their corresponding
deconvolution peaks. Both materials show deconvolution bands with similar binding energies, but BHET-Mo
shows and additional deconvolution peak to the three peaks obtained for BDC-Mo.
The first band for both materials centered in a binding energy of 530.2-530.3 eV that according to the XPS NIST
data base correspond to oxygen bonded to molybdenum as molybdate groups (MoO4
-2
). The second peak centered
in a binding energy of 531.3-531.7 eV is attributed to oxygen in compounds based on urea bonding (-NHCONH)
like the one found in biuret molecule (HN(CONH2)2). The third peak centered in a binding energy of 532.3-532.9

31
eV is related to the oxygen of carbonyl groups attached to the benzene ring (-O=C-C6H5). While the additional peak
presented in the BHET-Mo complex at ~533.4 eV indicates the oxygen nearing the carboxyl groups related to the
ester bonds of the BHET linker which is in line with the results found in FTIR spectra.
Fig.5. XPS narrow spectra of O1s (a) BDC-Mo and (b) BHET-Mo
The thermogravimetric analysis of BDC-Mo and BHET-Mo are plotted in Fig.6a. The TGA plot for both materials
depicts a sharp weight loss between 32% to 35% for BHET-Mo and BDC-Mo, respectively, in a range temperature
of 300°C-375°C that is associated to the loss of ammonium ions bonded to molybdate groups [21] and the
decomposition of BDC and BHET ligands. However, the trace thermal degradation of ligands continues up to
543°C and 610°C for BDC-Mo and BHET-Mo complexes [22] leading to molybdenum oxides. BHET-Mo shows
higher resistance to endothermic decomposition. indicating that the nucleophilic hydroxyl groups in BHET
improve the structural stability of this molybdenum-based complex.
The biocompatibility of molybdenum complexes was analyzed with a fibroblast viability assay at 24 h and 48 h
(Fig.6b). The results of fibroblast viability probe indicate that both BDC-Mo and BHET-Mo materials exhibit an
enhanced cell viability higher than the control (PBS 1X). It is expected that the end carboxyl groups of BDC
guarantee the biocompatibility of BDC-Mo [5]. However, BHET-Mo maintains the cell viability up to 48 h of
incubation, this possibly obeys to the biocompatibility of ester bonding in this material as the XPS indicates [23].
As the fibroblast metabolism has a crucial role in skin tissue regeneration to obtain the wound closure in a minor
lapse of time. This indicated that BDC-Mo and BHET-Mo metal-organic complexes possess suitable
characteristics to be applied in biomedical applications such as tissue engineering, controlled delivery of drugs and
antiproliferative agent against cancer cells [16].

32
Fig.6. (a) Thermogravimetric analysis and (b) fibroblast viability of molybdenum complexes
4. Conclusion
The physicochemical characterization results indicated that molybdenum-based complexes are molybdate units
bonded to BDC and BHET ligand by urea bonding obtaining rectangular prism particles made up of thin rods arrays
typical of MoO3 assemblies and molybdenum complexes, belonging to the monoclinic system with a P 2/m group
space. The ATR-FTIR indicated that molybdenum is covalently coordinated to BDC and BHET ligands by their
carbonyl groups due the shift of their typical vibration band to lower wavenumbers. Also, the absence of bands at
around 3400 cm-1
related to terminal hydroxyl groups in BHET-Mo material indicated the loss of hydroxyl groups
which was confirmed by XPS indicating an additional peak of O1s related to ester bonding.
The high fibroblast viability of BDC-Mo and BHET-Mo compared with the control was attributed to the end
carboxyl groups of BDC, end ethoxy groups of BHET and urea bonding, however the best biocompatibility of
BHET-Mo was associated to the additional ester bonding present in this material. The biocompatibility shown by
molybdenum complexes indicated that these materials could be applied in tissue engineering devoted to healing
skin, and controlled drug delivery.
Declarations
Source of Funding
This research was funded by Consejo Nacional de Ciencia y Tecnología (CONACyT) (grant FORDECYTPRO
NACES/6660/2020).
Competing Interests Statement
The authors declare no competing financial, professional, and personal interests.

33
Ethical Approval
Based on institutional guidelines.
Consent for publication
Authors declare that they consented for the publication of this research work.
Availability of data and material
Authors are willing to share the data and material according to relevant needs.
Authors’ Contributions
All authors equally contributed to data collection, research, and paper drafting.
References
[1] Hille, R. (2002). Molybdenum and tungsten in biology. Trends Biochem. Sci., 27(7): 360–367.
[2] Mendel, R.R. (2005). Molybdenum: biological activity and metabolism. Dalton Trans., 21: 3404–3409.
[3] Zu, Y., Yao, H., Wang, Y., Yan, L., Gu, Z., Chen, C., Gao, L & Yin, W. (2021). The age of bioinspired
molybdenum-involved nanozymes: synthesis, catalytic mechanisms, and biomedical applications. View, 2(3):
20200188.
[4] Mendel, R.R. (2009). Cell biology of molybdenum. Biofactors, 35(5): 429–434.
[5] Pandey, A., Dhas, N., Deshmukh, P., Caro, C., Patil, P., García-Martín, M.L., Padya, B., Nikam, A., Mehta, T.
& Mutalik, S. (2020). Heterogeneous surface architectured metal-organic frameworks for cancer therapy, imaging,
and biosensing: a state of the art review. Coord. Chem. Rev., 409: 213212.
[6] Bhardwaj, N., Pandey, S.K., Mehta, J., Bhardwaj, S.K., Kim, K.H. & Deep. A. (2018). Bioactive
nano-metal-organic frameworks as antimicrobial against Gram-positive and Gram-negative bacteria. Toxical. Res,
7(5): 931–941.
[7] Feng, M., Zhang, P., Zhou, H.C. & Sharma, V.K. (2018). Water-stable metal-organic frameworks for aqueous
remvoal of heavy metals and radionuclides: A review. Chemosphere, 209: 783–800.
[8] Stoski, A., Viante, M.F., Santos Nunes, C., Curti Muñiz, E., Felsner, M.A. & Policiano Almeida, C.A. (2016).
Water-stable metal-organic frameworks for aqueous remvoal of heavy metals and radionuclides: A review. Polym.
Int., 65(9): 1024–1030.
[9] Cabrera-Munguia, D.A., León-Campos, M.I., Claudio-Rizo, J.A., Solis-Casados, D.A., Flores-Guia, T.E. &
Cano-Salazar, L.F. (2021). Potential biomedical applications of a new MOF based on a derived PET: Synthesis and
characterization. Bull. Mat. Sci., 44(4): 245.
[10] Cabrera-Munguia, D.A., Claudio-Rizo, J.A., Aguayo-Morales, H. & Martínez-Mora, E.I. (2022). Gel-based
on collagen-polyacrylate-MOF as an adjuvant in skin wound healing: a case study. Asian Journal of Basic Science
& Research, 4(1): 60–69.

34
[11] Saska, M. & Myerson, A.S. (1985). Polymorphism and aging in terephthalic acid. Crystal Res. & Technol.,
20(2): 201–208.
[12] Castaño, V.M., Alvarez-Castillo, A., Vazquez-Polo, G., Acosta, D. & González, V. (1998). High resolution
electron microscopy of bis-(2-hydroxyethyl) terephthalate crystalline polymers. Microsc. Res. Tech., 40: 41–48.
[13] Yang, L., Li, X., Qi, T., Liu, G., Peng, Z. & Zhou, Q (2020). Direct synthesis of pure ammonium molibdates
from ammonium tetramolybdate and ammonium bicarbonate. ACS Sustainable Chem. Eng., 8(49): 18237–18244.
[14] Wang, M-L., Zhong, G-Q. & Chen, L. (2016). Synthesis, optical characterization, and thermal decomposition
of complexes based on biuret ligand. Int. J. Opt., 16: 5471818.
[15] Hou, G-F., Wang, X-D., Yu, Y-H., Gao, J-S., Wen, B. & Yan, P-F. (2013). A new topology constructed from
an octamolybdate and metallomacrocycle coordination complex. CrystEngComm., 15: 249–251.
[16] Joshi, A., Gupta, R., Sharma, D. & Singh M. (2021). Mo(VI) based coordination polymer as antiproliferative
agent against cancer cells. Dalton Trans., 50: 1253–1260.
[17] Maheswari, N. & Muralidharan, G. (2017). Controlled synthesis of nanostructured molybdenum oxide
electrodes for high performance supercapacitor devices. Appl. Surf. Sci., 416: 461–469.
[18] Cao, X., Zheng, B., Shi, W., Yang, J.., Fan, Z., Luo, Z., Rui, X., Chen, B., Yan, Q. & Zhang, H. (2015).
Reduced graphene oxide-wrapped MoO3 composites prepared by using metal-organic frameworks as precursor for
all solid state flexible supercapacitors. Adv. Mater., 27(32): 4695–4701.
[19] Zhang, X., Li, D., Dong, C., Shi, J. & Xu, Y. (2019). The synergistic supercapacitive performance of
Mo-MOF/PANI and its electrochemical impedance spectroscopy investigation. Mater. Today Commun., 21:
100711.
[20] Zhou, X., Lu, X., Wang, Q., Zhu, M. & Li, Z. (2012). Effective catalysis of poly(ethylene terephthalate) (PET)
degradation by metallic acetate ionic liquids. Pure Appl. Chem., 84(3): 789–801.
[21] Chithambararaj, A, Bhagya Mathi, D., Rajeswari Yogamalar, N. & Chandra Bose, A. (2015). Structural
evolution and phase transition of [NH4]6Mo7O2.4H2O to 2D layered MoO3-x. Mater. Res. Express, 2: 055004.
[22] Begüm Elmas Kimyonok, A. & Mehmet Ulutürk (2016). Determination of the thermal decomposition
products of terephthalic acid by using curie-point pyrolyzer. J. Energ. Mater., 34(2): 113–122.
[23] Undin, J., Finne-Wistrand & Albertsson, AN. (2016). Adjustable degradation properties and biocompatibility
of amorphous and functional poly(ester-acrylate)-based materials. Biomacromolecules, 15: 2800–2807.

Biocompatible Molybdenum Complexes Based on Terephthalic Acid and Derived from PET: Synthesis and Characterization

More Related Content

Similar to Biocompatible Molybdenum Complexes Based on Terephthalic Acid and Derived from PET: Synthesis and Characterization (20)

More from Associate Professor in VSB Coimbatore (20)

Recently uploaded (20)

Biocompatible Molybdenum Complexes Based on Terephthalic Acid and Derived from PET: Synthesis and Characterization