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Showing 1 to 12 of 4748 entries
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Effects of position (α or β) and linker heteroatom (O or S) of substituent on the photophysicochemical behavior of poly(oxyethylene) substituted ZnPcs and assessment of J-aggregation or protonation using TD-DFT computations.

Dalton transactions (Cambridge, England : 2003)

Ayhan MM, Altınbaş Özpinar G, Durmuş M, Gürek AG.
PMID: 23995014
Dalton Trans. 2013 Oct 01;42(41):14892-904. doi: 10.1039/c3dt51549d.

A series of zinc phthalocyanines (ZnPcs) tetra-substituted with 1,3-di[2-(2-ethoxyethoxy)ethoxy]-2-propanol () or 1,3-di[2-(2-ethoxyethoxy)ethoxy]-2-propanethiol () at peripheral (β) () and non-peripheral (α) () positions have been synthesized and characterized. The spectroscopic, photophysical (fluorescence quantum yields and lifetimes) and photochemical (singlet oxygen...

Semi-Centenary of the Introduction of Chloroform as an Anaesthetic.

British medical journal

[No authors listed]
PMID: 20757452
Br Med J. 1897 Nov 27;2(1926):1585-6.

No abstract available.

Thermodynamic characterization of halide-π interactions in solution using "two-wall" aryl extended calix[4]pyrroles as model system.

Journal of the American Chemical Society

Adriaenssens L, Gil-Ramírez G, Frontera A, Quiñonero D, Escudero-Adán EC, Ballester P.
PMID: 24494711
J Am Chem Soc. 2014 Feb 26;136(8):3208-18. doi: 10.1021/ja412098v. Epub 2014 Feb 17.

Herein, we report our latest experimental investigations of halide-π interactions in solution. We base this research on the thermodynamic characterization of a series of 1:1 complexes formed between halides (Cl(-), Br(-), and I(-)) and several α,α-isomers of "two-wall" calix[4]pyrrole...

Vibrational circular dichroism of 3-(trifluoroacetyl)-camphor and its interaction with chiral amines.

Chirality

Merten C, Jalkanen KJ, Weiss VC, Hartwig A.
PMID: 20186758
Chirality. 2010 Aug;22(8):772-7. doi: 10.1002/chir.20832.

Vibrational circular dichroism (VCD) spectroscopy and density functional theory (DFT) calculations are used to investigate the keto-enol equilibrium of 3-(trifluoroacetyl)-camphor (TFC) and to study the interaction of TFC with chiral amines in deuterated Chloroform. It is shown that the...

Solvent-type-dependent polymorphism and charge transport in a long fused-ring organic semiconductor.

Nanoscale

Chen J, Shao M, Xiao K, Rondinone AJ, Loo YL, Kent PR, Sumpter BG, Li D, Keum JK, Diemer PJ, Anthony JE, Jurchescu OD, Huang J.
PMID: 24217182
Nanoscale. 2014 Jan 07;6(1):449-56. doi: 10.1039/c3nr04341j. Epub 2013 Nov 11.

Crystalline polymorphism of organic semiconductors is among the critical factors in determining the structure and properties of the resultant organic electronic devices. Herein we report for the first time a solvent-type-dependent polymorphism of a long fused-ring organic semiconductor and...

Solvent-Driven Iodine-Mediated Oxidative Strategies for the Synthesis of Bis(imidazo[1,2-a]pyridin-3-yl)sulfanes and Disulfanes.

Chemistry, an Asian journal

Shakoor SMA, Agarwal DS, Khullar S, Mandal SK, Sakhuja R.
PMID: 28949075
Chem Asian J. 2017 Dec 05;12(23):3061-3068. doi: 10.1002/asia.201701274. Epub 2017 Nov 02.

Two efficient iodine-mediated strategies, which are economical and one-pot, are described to access bis(imidazo[1,2-a]pyridin-3-yl)sulfanes and bis(imidazo[1,2-a]pyridin-3-yl)disulfanes in chloroform and acetic acid, respectively, by a direct oxidative homocoupling of imidazo-heterocycles using inexpensive sodium sulfide as a sulfur source. These strategies...

An experimental and theoretical investigation of free Oxazole in conjunction with the DFT analysis of Oxazole⋯(H₂O)n complexes.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Yurdakul Ş, Badoğlu S, Özkurt L.
PMID: 26978786
Spectrochim Acta A Mol Biomol Spectrosc. 2016 Jun 05;162:48-60. doi: 10.1016/j.saa.2016.02.007. Epub 2016 Feb 17.

The mid-IR spectrum of Oxazole (Oxa) is recorded. This spectrum is interpreted with the help of B3LYP/6-311++G(d,p) calculations and potential energy distribution (PED) analysis. The experimental spectrum is concordant with the theoretical data. Geometrical parameters and the atomic charges...

Aggregation Processes of Perylene Bisimide Diimidazolium Salts.

Chemistry (Weinheim an der Bergstrasse, Germany)

D'Anna F, Marullo S, Lazzara G, Vitale P, Noto R.
PMID: 26346043
Chemistry. 2015 Oct 12;21(42):14780-90. doi: 10.1002/chem.201502240. Epub 2015 Sep 08.

The supramolecular aggregation of three diimidazolium-functionalized perylene bisimides, differing in the alkyl chain length was investigated. These salts form aggregates in solvents like chloroform, dichloromethane, and glycerol. Solvent-, concentration-, and temperature-dependent spectroscopic studies were carried out, evidencing the occurrence...

Evaluation of Ajuga bracteosa for antioxidant, anti-inflammatory, analgesic, antidepressant and anticoagulant activities.

BMC complementary and alternative medicine

Kayani WK, Dilshad E, Ahmed T, Ismail H, Mirza B.
PMID: 27677846
BMC Complement Altern Med. 2016 Sep 27;16(1):375. doi: 10.1186/s12906-016-1363-y.

BACKGROUND: Ajuga bracteosa has been extensively used traditionally for the treatment of a variety of diseases. The aim of the study was to scientifically validate the wide-scale exploitation of A. bracteosa in folk medicine various in vitro and in...

Supramolecular Interfacial Polymerization: A Controllable Method of Fabricating Supramolecular Polymeric Materials.

Angewandte Chemie (International ed. in English)

Qin B, Zhang S, Song Q, Huang Z, Xu JF, Zhang X.
PMID: 28480605
Angew Chem Int Ed Engl. 2017 Jun 19;56(26):7639-7643. doi: 10.1002/anie.201703572. Epub 2017 May 24.

A new method of supramolecular polymerization at the water-oil interface is developed. As a demonstration, an oil-soluble supramonomer containing two thiol end groups linked by two ureidopyrimidinone units and a water-soluble monomer bearing two maleimide end groups are employed....

Ameliorative Effects of Chloroform Fraction of Cocos nucifera L. Husk Fiber Against Cisplatin-induced Toxicity in Rats.

Pharmacognosy research

Adaramoye OA, Azeez AF, Ola-Davies OE.
PMID: 27034598
Pharmacognosy Res. 2016 Apr-Jun;8(2):89-96. doi: 10.4103/0974-8490.172658.

BACKGROUND: Cisplatin (Cis) is used in the treatment of solid tumors and is known to elicit serious side effects.OBJECTIVE: The present study investigated the protective effects of chloroform fraction of Cocos nucifera husk fiber (CFCN) against Cis-induced organs' damage...

Photoinduced electron transfer (PET) versus excimer formation in supramolecular p/n-heterojunctions of perylene bisimide dyes and implications for organic photovoltaics.

Faraday discussions

Nowak-Król A, Fimmel B, Son M, Kim D, Würthner F.
PMID: 26399996
Faraday Discuss. 2015;185:507-27. doi: 10.1039/c5fd00052a.

Foldamer systems comprised of two perylene bisimide (PBI) dyes attached to the conjugated backbones of 1,2-bis(phenylethynyl)benzene and phenylethynyl-bis(phenylene)indane, respectively, were synthesized and investigated with regard to their solvent-dependent properties. UV/Vis absorption and steady-state fluorescence spectra show that both foldamers...

Showing 1 to 12 of 4748 entries