Molecular recognition properties of water-soluble triazinophane 1a-c, derivatized through the straightforward SNAr reaction of common intermediate 5, were explored in aqueous media. Fluorescence titration of 1a-c using mono cationic aromatic hydrocarbon G1 and G2 as guests revealed that 1 prefers to form a host-guest complex with pyrene derivative G2 rather than anthracene derivative G1. Complex formation
作者:I. V. Safronov、I. A. Drachkova、I. O. Petruseva、S. N. Khodyreva、M. I. Dobrikov、T. M. Ivanova、G. V. Shishkin、O. I. Lavrik
DOI:10.1023/a:1012396431762
日期:——
ATP gamma -amides containing in gamma -N-position 1-methylpyrene, 9-methylanthracene, 10-chloro-9-methylanthracene, and 3-methylperylene residues were synthesized and characterized. These compounds were used as sensitizers of site-specific photomodification of the reconstituted elongating complex of the mammalian DNA polymerase beta. The photomodification was carried out with the use of photoaffinity reagents, which were synthesized in situ by the 5'-P-32-labeled primers extension with photoreactive analogues of dCTP containing in the exo-N-position of cytosine various perfluoroarylazide groups. The effect of structures of the sensitizers and photoreactive reagents on the efficiency and selectivity of photocrosslinking of primers to the enzyme and template, as well as formation of a number of other photomodification products was studied. It was shown that the sensitizers containing 10-chloro-9-methylanthracene and 3-methylperylene residues allow one to obtain photocrosslinks under such irradiation conditions when photomodification in their absence is not essentially observed.
Quinoxaline-walled π-stacking molecules: synthesis, conformation, and luminescence properties
作者:Teh-Chang Chou、Jing-Kai Huang、Sushilkumar S. Bahekar、Ju-Hsiou Liao
DOI:10.1016/j.tet.2014.08.071
日期:2014.11
synthesized. Intramolecular π–π interactions in solution were detected by NMR and fluorescence spectroscopy, in terms of reciprocal anisotropic shielding and exciplexformation, respectively. The X-ray crystallographic analysis revealed the preferential conformations in solid state, which were compatible with the results of conformational studies by NMR and fluorescence spectroscopy. The results collectively