Attenuated total reflectance/Fourier transform infrared (ATR/FTIR) mapping coupled with principal component analysis for the study of in vitro degradation of porous polylactide/hydroxyapatite composite material

Jing, Nan; Jiang, Xiaoting; Wang, Qian; Tang, Yongjiao; Zhang, Pudun

doi:10.1039/c4ay01289e

Cited by 23 publications

(18 citation statements)

References 30 publications

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“…The bands at 871, 1088, 1184, 1755 cm -1 are assigned to the C-C backbone stretching, symmetric and asymmetric stretching of C-O-C group and stretching vibration of C=O which are responsible for piezo-and ferroelectricty in PLLA nanofibers. 30,31 All the bands of different wavenumbers are labelled in Fig. 1d.…”

Section: Resultsmentioning

confidence: 99%

Human skin interactive self-powered wearable piezoelectric bio-e-skin by electrospun poly-l-lactic acid nanofibers for non-invasive physiological signal monitoring

et al. 2017

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Section: Resultsmentioning

confidence: 99%

Human skin interactive self-powered wearable piezoelectric bio-e-skin by electrospun poly-l-lactic acid nanofibers for non-invasive physiological signal monitoring

et al. 2017

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“…Data analysis of the recorded spectra was performed using the multivariate method i‐PCA (MATLAB ® software, The Mathworks, Inc.). Since few differences between pure amylopectin solution spectrum and amylopectin–metal complexes spectra can be found, i‐PCA is able to distinguish these small differences and determine in which spectrum range that change had happened .…”

Section: Methodsmentioning

confidence: 99%

Study of complexes formation between transition metal ions and amylopectin in DMSO/H₂O solution

2016

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The complexation ability of amylopectin (starch polymer) treated with ultrasound in DMSO/ H 2 O solution was investigated with respect to several metal ions, with the assistance of a factorial design (experimental planning), in order to establish and optimize the best complexation conditions. Acetate, chloride, and nitrate were counter-ions in the metal salts. The effects of temperature, time, and salt amount were evaluated during the complexation reactions using multivariate analysis, a set of mathematic methods capable of evaluating all system variables at once and, through this, temperature was found to be the most influential variable. Results for pH and conductivity provided evidence of complex formation between amylopectin and metal ions. In addition, small shifts in the vibrational frequency between the pure biopolymer and its metal complexes were detected using principal component analysis by interval (i-PCA, a multivariate analysis method), supporting the formation of complexes. The complexes formed with Cu II and Cr III ions presented the best complexation yield (40.0 and 55.4%, respectively) with the biopolymer.

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“…The presence of H 4 SiMo 12 O 40 was characterized by its characteristic stretching such as M-O stretching at 966 cm −1 and 1004 cm −1 . Selective important IR stretching frequencies have been put together in Table 1 for better comparison [35][36][37][38].…”

Section: Ft-ir Analysismentioning

confidence: 99%

Polyoxometalate functionalized matrix material: synthesis, characterization, reductive and thermal degradation kinetics

Sabarinathan¹,

Vijayakumar

Arumuganathan³

2020

SN Appl. Sci.

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One-pot synthesis of polyoxometalate (POM) based hybrid material 1 was synthesized by mixing copper nitrate, silicomolybdic acid and urea under hydrothermal condition. The reduction ability of 1 was examined by employing 2,4,6-trinitrophenol (2,4,6-TNP) and 4-nitrophenol (4-NP) in the presence of sodium borohydride in water. The catalytic reduction into the corresponding amine was monitored by UV-Visible spectroscopy. The rate and order of catalytic reduction were studied through chemical kinetics and follows pseudo-first-order. The efficiency of the catalyst was investigated by employing used catalyst 1 for at least ten cycles. Leaching experiments and performance of the reusability of catalyst were supported by FT-IR analyses. In addition, the electrochemical reduction ability of catalyst 1 was also executed by Cyclic Voltammetry (CV). Catalyst 1 was characterized by Fourier-Transform Infrared spectroscopy (FT-IR), Powder X-ray diffraction (PXRD), UV-Diffused Reflectance (UV DRS), Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDX), X-ray Photoelectron Spectroscopy (XPS), and Bruner-Emmet-Teller analyses (BET). Solid-state decomposition kinetics of 1 was performed from Thermogravimetric Analysis (TGA) data by fitting into model equations such as Flynn-Wall-Ozawa (FWO) and corrected (C-FWO).of steps in synthesis, reporting with a lower yield, specific and selectivity, etc. [17]. Copious reports were available with gracious metals such as Pd and Pt catalysts, however, the expensive nature of such metals restrict the common usage [18,19]. Hence, the development of a novel simple methodology for the reductive conversion with selectivity is currently required research area [20]. In this present work, we adopt the simple one-pot synthesis route of title compound by hydrothermal technique.The Polyoxometalates (POM) are metal-oxo clusters of molybdenum, tungsten, and vanadium, etc. attracting considerable interest because of their versatility [21]. The POMs are well known for their usage in multiple fields such as medicine, electronics, magnetism, optics [22], conductance, supramolecular chemistry [23], adsorption [24], antitumor [25], anti-cancer [26], anti-bacterial [27] and catalysis etc. [28]. Usage of POM cluster as a catalyst along with transition metal support in the form of matrix composite could have an added advantage over to either as bare transition metals/plain POM treatment like controlled oxidation, deactivation in air, stopping magnetically induced aggregation, etc. [29][30][31]. It is worth mentioning that in the presence of NaBH 4 the POM has been reported as an efficient reductive catalyst as the reduction concern [32]. In this present work, we report a novel inorganic-organic hybrid composite POM-hybrid (1) material isolated in situ and applied as a reductive catalyst for aromatic nitrophenol derivatives in an aqueous medium.

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Attenuated total reflectance/Fourier transform infrared (ATR/FTIR) mapping coupled with principal component analysis for the study of in vitro degradation of porous polylactide/hydroxyapatite composite material

Abstract: We proposes coupling ATR/FTIR mapping with principal component analysis for the biomimetic degradation of poly(l-lactide)/hydroxyapatite composite material.

Cited by 23 publications

References 30 publications

Human skin interactive self-powered wearable piezoelectric bio-e-skin by electrospun poly-l-lactic acid nanofibers for non-invasive physiological signal monitoring

Human skin interactive self-powered wearable piezoelectric bio-e-skin by electrospun poly-l-lactic acid nanofibers for non-invasive physiological signal monitoring

Study of complexes formation between transition metal ions and amylopectin in DMSO/H₂O solution

Polyoxometalate functionalized matrix material: synthesis, characterization, reductive and thermal degradation kinetics

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Attenuated total reflectance/Fourier transform infrared (ATR/FTIR) mapping coupled with principal component analysis for the study of in vitro degradation of porous polylactide/hydroxyapatite composite material

Abstract: We proposes coupling ATR/FTIR mapping with principal component analysis for the biomimetic degradation of poly(l-lactide)/hydroxyapatite composite material.

Cited by 23 publications

References 30 publications

Human skin interactive self-powered wearable piezoelectric bio-e-skin by electrospun poly-l-lactic acid nanofibers for non-invasive physiological signal monitoring

Human skin interactive self-powered wearable piezoelectric bio-e-skin by electrospun poly-l-lactic acid nanofibers for non-invasive physiological signal monitoring

Study of complexes formation between transition metal ions and amylopectin in DMSO/H2O solution

Polyoxometalate functionalized matrix material: synthesis, characterization, reductive and thermal degradation kinetics

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Study of complexes formation between transition metal ions and amylopectin in DMSO/H₂O solution