The structure of the title compound, C(16)H(13)NO(2), was determined as a part of a project on the synthesis of new compounds which can make two-photon absorptions. In the crystal structure, both aldehyde groups are located within the carbazole plane. One of these groups is disordered and was refined using a split model with site-occupation factors for each position of 0.5.

In the title mol-ecule, C21H20N2O2S, the dihedral angle between the mean plane of the carbazole ring system [maximum deviation = 0.021 (4) Å] and the benzene ring is 80.15 (6)°. In the crystal, mol-ecules are linked by N-H⋯O and weak C-H⋯O hydrogen bonds into a C(8) chain along [001].

In the title compound, C(18)H(11)NO, the carbazole and benzofuran rings are almost co-planar, making a dihedral angle of 3.31 (3)°. The crystal structure is stabilized by weak C-H⋯π inter-actions.

The present study (see ref 1) delineates the scope and limitations of porphyrin chromophores for structural studies by the exciton coupled circular dichroic (CD) method. A distance dependency of the porphyrin coupling was investigated in the range between 10 and 50 Å. Over short interchromophoric distances, significant changes in the conformational distribution introduced by the bulky porphyrin...

Several proposals to construct artificial photoresponsive polymer systems have been described. chromophores in the backbone reversibly changed the conformation by ultraviolet light irradiation(410 > > 350 nm), which causes the trans to cis isomerization of the chromophores. Aqueous solutions of poly(N-isopropylacrylamide) with pendant azobenzene chromophores showed a photostimulated phase separ...

Six nonlinear, optical chromophores, Z1–Z6, based on the bis(N,N-diethyl)aniline-derived donor and thiolated isophorone bridge, were designed synthesized. The was applied in a chromophore with as an electron bridge for first time. In particular, parts of chromophores Z2–Z6 modified different functional groups, including tert-butyltrimethylsilane tert-butyl(methyl)diphenylsilane derivative: 1,3-...

Anthracene, fluorene, carbazole, dibenzofuran, and dibenzothiophene are five typical by-products of coal conversion which are likely to be environmental pollutants. These were radiolabeled to high specific activity and purity by simple tritium exchange and evaluated for environmental fate in laboratory model ecosystems. Anthracene and fluorene were biologically converted to hydroxy and keto ana...

Microwave assisted new aldol condensation reaction of 1-oxo-1,2,3,4tetrahydrocarbazoles 1 with thiophene-2-carbaldehyde 2 in the presence of alcoholic KOH affords a single product 2-Thiophen-2-ylmethylene-2,3,4,9-tetrahydro-carbazol-1-one 3. 3 on irradiation with hydroxylamine hydrochloride yielded 3-Thiophen-2-yl-4,5-dihydro-10H-2-oxa-1,10-diazacyclopenta[a]carbazole 4 and 3 on irradiation wit...

In the title compound, C21H23NO2, the hexyl group adopts an extended conformation, the six C atoms are nearly coplanar [maximum deviation = 0.082 (3) Å] and their mean plane is approximately perpendicular to the carbazole ring system, with a dihedral angle of 78.91 (15)°. In the crystal, mol-ecules are linked by O-H⋯O hydrogen bonds, forming inversion dimers; π-π stacking between carbazole ring...

A novel boron-containing π-conjugated compound has been synthesized by the introduction of electron-acceptors (dimesitylboron groups) at the 3,3'-positions of a carbazole dimer (electron-donor). The compound possesses excellent electrochemical properties and high fluorescence quantum yields. In addition, is a sensitive fluorescence sensor with remarkable colour changes and the results could ...