SPECTROSCOPIC STUDY OF EFFECTS OF TETRAALKYLAMMONIUM CATIONS ON F−-SENSING PROPERTIES OF CALIX[4]PYRROLE BORADIAZAINDACENE DYE | Zendy

Yongjun Lv | Zendy

Open Access

SPECTROSCOPIC STUDY OF EFFECTS OF TETRAALKYLAMMONIUM CATIONS ON F⁻-SENSING PROPERTIES OF CALIX[4]PYRROLE BORADIAZAINDACENE DYE

Author(s) -

Yongjun Lv

Publication year - 2016

Publication title -

química nova

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.214

H-Index - 73

eISSN - 1678-7064

pISSN - 0100-4042

DOI - 10.5935/0100-4042.20160091

Subject(s) - pyrrole , chemistry , inorganic chemistry , organic chemistry

A novel meso-tetracyclohexylcalix[4]pyrrole-based boradiazaindacene dye 3 was synthesized and characterized. F--binding properties of the dye in the presence of tetrabutylammonium (TBA+), tetraethylammonium (TEA+), and tetramethylammonium (TMA+) counter ions were investigated by UV-Vis, fluorescence, and NMR spectroscopies. Dye 3 displayed various degrees of absorption red shift, fluorescence quenching, and downfield shifts of NH signals for the three fluoride salts. The association constants of these salts mainly depend on cation size effects and ion-pairing effects and were in the order KTMA+ > KTEA+ > KTBA+. Thus, we speculate that both F- and tetraalkylammonium cations are concomitantly located above and below a bowl-shaped calix[4]pyrrole cup in an ion-paired complex, respectively

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