The different recognition mechanism of carbazole derivatives for biological important anion: Theory and experiment

XUEFANG SHANG ^[1] ; HONGWEI WU ^[1] ; SHENYU JIA ^[1] ; JIE HAN ^[1] ; YUN LIU ^[1] ; ZHENYA YIN ^[1] ; XIAOJIAO QIN ^[1] ; JINLIAN ZHANG ^[1] ; XIUFANG XU ^[2]
1. [1] Xinxiang Medical University
  
  Xinxiang Medical University
  
  China
2. [2] Nankai University
  
  Nankai University
  
  China
Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 58, Nº. 3, 2013, págs. 1862-1866
Idioma: inglés
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Resumen
- Two fluorescent anion sensors bearing phenol, carbazole-NH and -NO2 group were designed and synthesized. They both exhibited highly binding ability for H2PO4- among the anions tested. In the presence of H2PO4-, the fluorescence of the sensors underwent a dramatic enhancement, while the presence of other anions such as F-, AcO-, Cl-, Br-, and I-, had weak or no effect on the fluorescence. The determination limit of two sensors (1 and 2) toward H2PO4- were 3.0x10-7 and 5.0x10-7 molˑL-1, respectively. Theoretical investigation indicated it was the highest HOMO to induce the red-shift phenomena of two sensors.