The modulation effect of carboxylic acid ligands on the electron transfer photochromism of naphthalene diimide-derived coordination polymers

2021 ◽  
Author(s):  
Gao-Peng Li ◽  
Huihui Zhu ◽  
Pengfei Hao ◽  
Junju Shen ◽  
Yunlong Fu
Keyword(s):  
Electron Transfer ◽  
Carboxylic Acid ◽  
Coordination Polymers ◽  
Terephthalic Acid ◽  
Phthalic Acid ◽  
Modulation Effect ◽  
Naphthalene Diimide

Four naphthalene diimide (NDI)-derived coordination polymers (CPs), [Cd(3-DPNDI)(o-BDC)] (1), [Cd(3-DPNDI)2(p-BDC)(NO3)] (2), [Cd(3-DPNDI)(NDC)(H2O)2] (3), [Cd(3-DPNDI)(BPC)(H2O)] (4) (3-DPNDI = N,N'-di-(3-pyridyl)-1,4,5,8-naphthalene diimide，o-BDC = phthalic acid, p-BDC = terephthalic acid, NDC = 2,6-naphthalenedicarboxylic acid,...

scholarly journals Some Decomposition Routes in the Mass Spectra of Aromatic Carboxylic Acids

1965 ◽  
Vol 20 (7) ◽  
pp. 883-887 ◽  
Author(s):  
J. H. Beynon ◽  
B. E. Job ◽  
A. E. Williams
Keyword(s):  
Carboxylic Acid ◽  
Benzoic Acid ◽  
Terephthalic Acid ◽  
Phthalic Acid ◽  
Mass Spectra ◽  
Deuterium Atom ◽  
Acid Group ◽  
Isophthalic Acid ◽  
Carboxylic Acid Group ◽  
Hydrogen Atoms

The mass spectra of benzoic acid, phthalic acid, isophthalic acid and terephthalic acid, together with the analogues deuterated on the carboxylic acid group have been studied. Exchange of the deuterium atom with hydrogen atoms on the positions ortho to a carboxylic acid group on the aromatic ring has been studied using meta-stable peaks.

Two-semiconductive-component hybrid coordination polymers with controllable photo-induced electron-transfer properties

2016 ◽  
Vol 45 (15) ◽  
pp. 6339-6342 ◽  
Author(s):  
Jian-Jun Liu ◽  
Yong Chen ◽  
Mei-Jin Lin ◽  
Chang-Cang Huang ◽  
Wen-Xin Dai
Keyword(s):  
Electron Transfer ◽  
Coordination Polymers ◽  
Organic Hybrid ◽  
Naphthalene Diimide ◽  
Metal Iodide ◽  
Photo Induced Electron Transfer ◽  
Electron Transfer Properties ◽  
Hybrid Coordination ◽  
Transfer Properties

Two semiconductive inorganic–organic hybrid coordination polymers constructed from semiconductive metal iodide clusters and naphthalene diimide components have been synthesized, which exhibited different photo-induced electron-transfer properties.

scholarly journals Pt/TiO2 Catalyzed Hydrogenation of Benzoic Acid with Unprecedented High Activity

2020 ◽  
Author(s):  
Miao Guo ◽  
Xiangtao Kong ◽  
Chunzhi Li ◽  
Qihua Yang
Keyword(s):  
Electron Transfer ◽  
Benzoic Acid ◽  
High Activity ◽  
Aromatic Ring ◽  
Terephthalic Acid ◽  
Phthalic Acid ◽  
Dft Calculation ◽  
Carboxyl Group ◽  
Trimesic Acid ◽  
Transfer Direction

Abstract The hydrogenation of benzoic acid (BA) to corresponding cyclohexanecarboxylic acid has important industry and academia significance, however, the electron deficient aromatic ring and the catalyst “poison” by carboxyl group make BA hydrogenation as one of the most challenging transformations. Herein, we found that Pt NPs deposited on TiO2 were very effective for BA hydrogenation with a record TOF of 4490 h− 1 under 80 oC and 50 bar H2 in hexane, one order higher than the reported results. DFT calculation showed that Pt NPs had a weaker interaction with BA than Ru and Pd NPs commonly used for BA hydrogenation, which improved the toxicity resistance of catalyst to BA. Pt/TiO2 catalysts with electron deficient and electron enriched Pt sites were successfully synthesized by modifying the electron transfer direction between Pt and TiO2. Isotopic experiments suggested the participation of dissociated H from carboxyl group in BA hydrogenation. Consequently, the electron deficient Pt sites with stronger adsorption of BA were more active than electron rich Pt sites in BA hydrogenation. In addition to BA, terephthalic acid, iso-phthalic acid, trimesic acid and other BA derivatives could also be efficiently converted to corresponding aromatic saturated products, demonstrating the wide substrate scope of Pt/TiO2.

Photo-induced variation of magnetism in coordination polymers with ligand-based electron transfer

2021 ◽  
Author(s):  
Yan-Lei Lu ◽  
Wen-Long Lan ◽  
Wei Shi ◽  
Qionghua Jin ◽  
Peng Cheng
Keyword(s):  
Electron Transfer ◽  
Coordination Polymers ◽  
Optical Memory ◽  
High Density ◽  
Information Storage ◽  
Memory Devices ◽  
Storage Materials ◽  
Potential Applications ◽  
Induced Variation

Photo-induced variation of magnetism from ligand-based electron transfer have been extensively studied because of their potential applications in magneto-optical memory devices, light-responsive switches, and high-density information storage materials. In this...

Studies on Sporopollenin Biosynthesis in Cucurbita maxima I: The Substantial Labeling of Sporopollenin from Cucurbita maxima after Application of [14C]Phenylalanine

1993 ◽  
Vol 48 (1-2) ◽  
pp. 10-15 ◽  
Author(s):  
Sabine Gubatz ◽  
Rolf Wiermann
Keyword(s):  
Terephthalic Acid ◽  
Phthalic Acid ◽  
Degradation Products ◽  
Hydroxybenzoic Acid ◽  
Cucurbita Maxima ◽  
Purification Step ◽  
Decanedioic Acid ◽  
Octanedioic Acid ◽  
High Level ◽  
Tracer Experiments

The results of tracer experiments performed with anthers of Tulipa cv. Apeldoorn have already shown that a high level of incorporation into the sporopollenin fraction was achieved, when [14C]phenylalanine was applicated as a precursor. In order to investigate whether the substantial incorporation of [14C]phenylalanine is a unique phenomenon restricted to Tulipa, tracer experiments were carried out on anthers of Cucurbita maxima. The sporopollenin fraction was isolated and purified by a gentle method including extractions with various solvents, incubations with hydrolysing enzymes and fractionated saponifications. The remaining, as well as the released radioactivity, was determined after each purification step. After the application of [U-14C]phenylalanine, a substantial incorporation into the sporopollenin fraction was determined. The values were clearly higher than those obtained with [1-14C]glucose or those from corresponding experiments on Tulipa anthers. After potash fusion of sporopollenin fractions labeled via [U-14C]phenylalanine, p-hydroxybenzoic acid was shown to be the main com ponent among the ether soluble acids; moreover it showed the highest level of radioactivity. No radioactivity was detected in the degradation products oxalic acid, benzoic acid, phthalic acid and terephthalic acid or octanedioic acid- and decanedioic acid-dimethylester.

scholarly journals Photoluminescent Coordination Polymers Based on Group 12 Metals and 1H-Indazole-6-Carboxylic Acid

Inorganics ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 20
Author(s):  
Antonio A. García-Valdivia ◽  
Estitxu Echenique-Errandonea ◽  
Gloria B. Ramírez-Rodríguez ◽  
José M. Delgado-López ◽  
Belén Fernández ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Coordination Polymers ◽  
Density Functional ◽  
Free Ligand ◽  
Emission Spectra ◽  
Point Of View ◽  
Theoretical Point ◽  
Fourier Transformed Infrared Spectroscopy ◽  
3D Network ◽  
The Stability

Two new coordination polymers (CPs) based on Zn(II) and Cd(II) and 1H-indazole-6-carboxylic acid (H2L) of general formulae [Zn(L)(H2O)]n (1) and [Cd2(HL)4]n (2) have been synthesized and fully characterized by elemental analyses, Fourier transformed infrared spectroscopy and single crystal X-ray diffraction. The results indicate that compound 1 possesses double chains in its structure whereas 2 exhibits a 3D network. The intermolecular interactions, including hydrogen bonds, C–H···π and π···π stacking interactions, stabilize both crystal structures. Photoluminescence (PL) properties have shown that compounds 1 and 2 present similar emission spectra compared to the free-ligand. The emission spectra are also studied from the theoretical point of view by means of time-dependent density-functional theory (TD-DFT) calculations to confirm that ligand-centred π-π* electronic transitions govern emission of compound 1 and 2. Finally, the PL properties are also studied in aqueous solution to explore the stability and emission capacity of the compounds.

Carboxylic Acid-Doped SBA-15 Silica as a Host for Metallo-supramolecular Coordination Polymers†

2008 ◽  
Vol 112 (46) ◽  
pp. 14637-14647 ◽  
Author(s):  
D. Akcakayiran ◽  
D. Mauder ◽  
C. Hess ◽  
T. K. Sievers ◽  
D. G. Kurth ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Coordination Polymers ◽  
Supramolecular Coordination
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