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We synthesized a novel colorimetric anion chemosensor bearing benzimidazole motifs as recognition sites in the pods of the receptor. The addition of tetrabutylammonium salts of F − or AcO − to the solution of receptor caused dramatic color changes from colorless to yellow, which was clearly...
The bromine atom in a fullerene-mixed peroxide derivative is replaced by an alkoxyl group under visible light irradiation or in the presence of silver salt. Homolytic or heterolytic cleavage of the C 60 –Br bond is proposed to explain the mechanism. The presence of oxygen is also a key factor...
The ring opening of various epoxides was achieved under mild conditions using bismuth(III) salts. Halohydrins and β-hydroxy nitrates were efficiently obtained from the corresponding 5α,6α-, 2α,3α-, and 5β,6β-epoxysteroid using BiCl 3 , BiBr 3 or Bi(NO 3 ) 3 ·5H 2 O. Considerations about...
Two electron donor–π-acceptor (D–π-A) chromospheres, with ferrocene as the electron donor and pyridinium as the electron acceptor, were synthesized. The nonlinear optical absorption (NOA) properties in the solution state were investigated by the Z-scan technique. Both compounds exhibited...
New indole alkaloid analogues, containing a 10b-methyl- or a 10b-hydroxy-1,2,4,5,10b,10c-hexahydropyrrolo(1′,2′,3′:1,9a,9)imidazo(1,2- a )indole skeleton, have been obtained by highly stereoselective electrophile addition–cyclization reactions of a tryptophan-derived α-amino nitriles.
Two ruthenium tris-bipyridine functionalized porphyrins 4 , 8 and their Zn derivatives 4 – Zn , 8 – Zn were designed, synthesized, and characterized. The redox potentials of these complexes as well as their corresponding monomeric reference porphyrin and ruthenium bipyridine complexes were...
Two novel organic dyes ( JK-5 and JK-6 ) containing bis-dimethylfluorenyl amino phenyl thiophene and additional methine unit are synthesized. Nanocrystalline TiO 2 dye-sensitized solar cell was fabricated using these dyes. A solar-to-electric conversion efficiency of 5.12% and 4.78% is achieved...
Mono- and trans -1,4-dialkoxy substituted cyclohexanes (alkyl=Me, Et, i -Pr, t -Bu) were prepared using the solvomercuration–demercuration (SM–DM) procedure. The axial⇋axial and axial,axial⇋equatorial, equatorial conformational equilibria of the products were studied by low temperature 1...
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