TG–DTA, UV and FTIR spectroscopic studies of urea–thiourea mixed crystal

Madhurambal, G.; Mariappan, M.; Mojumdar, S. C.

doi:10.1007/s10973-010-0763-3

Cited by 32 publications

(14 citation statements)

References 23 publications

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“…The peak at 1675 cm −1 corresponds to the elongation of the double bond CO; the peak at 1590 cm −1 is related to the stretching of the bonds in NH or NH 2 ; the peak at 1462 cm −1 corresponds to the shortening of the CN bond; the peak at 1150 cm −1 is due to the symmetric stretching of NH; and the peak at 715 cm −1 corresponds to the bending of the NH bond. These results have been described in previous studies .…”

Section: Resultssupporting

confidence: 92%

Free‐radical polymerization of urea, acrylic acid, and glycerol in aqueous solutions

Fernandes

Pinto

Albuquerque

et al. 2015

Polymer Engineering & Sci

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The main objective of the present study is to produce copolymers of urea, acrylic acid, and glycerol through aqueous solution free‐radical polymerizations and analyze the structural, thermal, rheological, and release properties of the obtained materials. To do this, aqueous solution copolymerizations were performed in different reaction conditions and the obtained copolymers were characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, rheological analyses, thermogravimetry, gel permeation chromatography, and rates of urea release in distilled water. The obtained results indicate that all constituents of the reacting mixture (potassium persulfate, glycerol, urea, and acrylic acid) affect the characteristics of the produced copolymers. In particular, it is shown that urea can be incorporated into the final copolymer through the proposed reaction scheme, that glycerol promotes crosslinking of polymer chains and that the obtained copolymer materials can be used in agricultural applications. POLYM. ENG. SCI., 55:1219–1229, 2015. © 2015 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 92%

Free‐radical polymerization of urea, acrylic acid, and glycerol in aqueous solutions

Fernandes

Pinto

Albuquerque

et al. 2015

Polymer Engineering & Sci

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“…6a and b, infrared spectra of FAI-PbI 2 -thiourea, PbI 2thiourea and thiourea are shown. The stretching vibration of S=C for thiourea appears at 730 cm −1 and indicates its change to a lower wavenumber of 724 and 714 cm −1 after interaction with PbI 2 only and FAI and PbI 2 , correspondingly, suggestive for its adducts with both precursors [52]. This reasonable change of S=C vibration shows that thiourea robustly coordinates with FAI and PbI 2 .…”

Section: Science China Materialsmentioning

confidence: 78%

Elucidating the dynamics of solvent engineering for perovskite solar cells

et al. 2018

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Researchers working in the field of photovoltaic are exploring novel materials for the efficient solar energy conversion. The prime objective of the discovery of every novel photovoltaic material is to achieve more energy yield with easy fabrication process and less production cost features. Perovskite solar cells (PSCs) delivering the highest efficiency in the passing years with different stoichiometry and fabrication modification have made this technology a potent candidate for future energy conversion materials. Till now, many studies have shown that the quality of active layer morphology, to a great extent, determines the performance of PSCs. The current and potential techniques of solvent engineering for good active layer morphology are mainly debated using primary solvent, co-solvent (Lewis acid-base adduct approach) and solvent additives. In this review, the dynamics of numerously reported solvents on the morphological characteristics of PSCs active layer are discussed in detail. The intention is to get a clear understanding of solvent engineering induced modifications on active layer morphology in PSC devices via different crystallization routes. At last, an attempt is made to draw a framework based on different solvent coordination properties to make it easy for screening the potent solvent contender for desired PSCs precursor for a better and feasible device.

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“…The lowest absorption is ITO/TiO 2 /PEDOT: PSS/ iCHLO-PA (5%) and ITO/TiO 2 /PEDOT: PSS/ iCHLO-PA (15%) together with the absorption of dye without the conjugated of dye ITO/TiO 2 /PEDOT: PSS/ CHLO-PA. This shows broader and stronger absorption of spectrum could give a huge impact to the performance of power conversion efficiency (PCE) [40][41][42].…”

Section: F Absorption Spectrum Of Thin Filmmentioning

confidence: 99%

Hybrid Solar Cell using Conjugated Chlorophyll from Pandanus Amaryllifolius as Photosensitizers

Ishak*,

Salleh,

Dagang

et al. 2019

IJRTE

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Solar energy is one in all few sources to renewable power and it is considerably critical in our each day lifestyles usage thus resulted to ensure the practicality and usefulness of the devices which regularly used to capture and manipulate solar energy. In this work, studies the effect of conjugated chlorophyll (iCHLO) on power conversion efficiency with relation of iCHLO where optical and electrical properties were investigated. These hybrid solar cells consist of combination of organic (Poly (3, 4-ethylenedioxythiophene): poly (styrenesulfonate) and iCHLO) and inorganic (Titanium Dioxide, TiO2) materials. These hybrid solar cells were fabricated bilayer of ITO/TiO2/PEDOT: PSS/iCHLO/Al. Chlorophyll compound (CHLO) was extracted from the Pandanus amaryllifolius leaves. CHLO undergoes conjugate process by oxidation polymerization using Ferric Chloride (FeCl3) as catalyst. Different percentage of FeCl3 was varied by 5%, 10% and 15% of CHLO molecular weight. Result shows that UV-Vis absorption spectra of CHLO was absorbed in the range of 400 nm – 600 nm (CHLO-PA) and 240 nm - 360 nm (iCHLO-PA). The highest power conversion efficiency (PCE) was obtained at 1.33% and electrical conductivity is 0.135 Scm1 for ITO/TiO2/PEDOT: PSS/iCHLO-PA 10% hybrid solar cell.

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TG–DTA, UV and FTIR spectroscopic studies of urea–thiourea mixed crystal

Cited by 32 publications

References 23 publications

Free‐radical polymerization of urea, acrylic acid, and glycerol in aqueous solutions

Free‐radical polymerization of urea, acrylic acid, and glycerol in aqueous solutions

Elucidating the dynamics of solvent engineering for perovskite solar cells

Hybrid Solar Cell using Conjugated Chlorophyll from Pandanus Amaryllifolius as Photosensitizers

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