FTIR peak at 2364cm 1 indicates the formation of S–H bond which confirms the attachment of PEG to ZnS surface by S–H bond formation. The XRD, FTIR, DLS and optical study such as UV–Vis results support the particle size reduction upon capping ZnS with PEG and dicarboxylic-terminated ...
Adipic acid (dicarboxylic) has lower solubility but its decomposition point is higher than peak soldering temperature which may cause incomplete outgassing of residue [9,44–46]. Whereas, citric acid (tricarboxylic acid) has lower solubility however, the number of carboxylic groups is higher as ...
(b) The total integral of the COOH peak corresponds well to the COOH mass fraction measured by 1H NMR. X-ray scattering While FTIR spectroscopy confirms that the COOH groups participate in hydrogen bonding, X-ray scattering detects aggregates of these hydrogen-bonded acid groups in 1h(x/4)-...
Later, it was reported that acetic acid (AcOH) could be produced via methanol hydrocarboxylation with CO2 and H2 at above 180 °C, which was accelerated by Ru-Rh bimetallic catalyst, imidazole ligand and LiI promoter19. This reaction could also be efficiently accelerated by Rh catalyst, in...
hyperbranched aromatic poly(ether ketone) terminated with carboxylic acid groups (P2) was synthesized via a one-step polycondensation of a symmetric AB2 monomer, 4,40-(m-phenylenedioxy)-bis(benzenecarboxylic acid), using phosphorous pentoxide-methanesulfonic acid (PPMA) as a condensing agent and ...
A series of rare earth europium complexes with different carboxylic acid ligands Eu(Lc)3phen (Lc = MAA, AA, BA, SA) were synthesized. The complexes were characterized by FTIR, TG-DSC, XRD, UV absorption spectra, and photoluminescence spectra (PL) to study the structure, thermal stability, ...
FTIR spectra of the analyzed samples were recorded in the range from 4000 to 700 cm−1 (Supplementary materials 1). A band with a maximum of ~ 3333 cm−1 was observed only for the PHA sample produced by P. homiensis grown on valeric acid. It probably originates from terminal ...
FTIR spectroscopy has been used to investigate the surface interaction of TiO2 powder particles sensitized with two of the most efficient sensitizers, the mono-nuclear complex [RuL2(SCN)2 and the tri-nuclear complex RuL2[μ-(CN)Ru(CN)L′2]2 {L=4,4′-dicarboxylic acid-2,2′-bipyridine an...
Fig. 3. FTIR spectra of (A) unmodified HA, (B) Lac-HA, (C) Tar-HA and (D) Cit-HA. 3.3. Carboxylic acid functionalised HA as carrier of Cur-NPs Surface functionalization of HA with different carboxylic acids to harbor negative charges was designed to increase drug (Cur-NPs) loading ...
The invention provides the crystalline imidazole-5-carboxylic acid derivative (I, the chemical name: 2-butyl-4-chloro-1-[2′-(1H-tetrazol-5-yl) 1,1′-biphenyl-methyl]-imidazole-5-carb