Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (12): 1447-1455.DOI: 10.11944/j.issn.1000-0518.2019.12.190084

• Full Papers • Previous Articles     Next Articles

Colorimetric Sensors for Anion Recognition Based on Benzeneazophenol

LIN Shengshenga,HE Qingyuna,ZHOU Jiamina,ZHAO Mingpenga,FENG Zongcaib,YU Biaob,SONG Xiumeiab*()   

  1. aInstitute for Advanced Materials,Lingnan Normal University,Zhanjiang 524048,China;
    bSchool of Chemistry and Chemical Engineering,Lingnan Normal University,Zhanjiang 524048,China
  • Received:2019-04-01 Accepted:2019-07-11 Published:2019-12-01 Online:2019-12-10
  • Contact: SONG Xiumei
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21805125), the Science and Technology Planning Project of Zhanjiang(No.2015A020203), and the Innovation and Entrepreneurship Training Program for College Students(No.201810579701)

Abstract:

Three colorimetric sensors S1, S2 and S3 based on azobenzene containing different numbers of active phenolic hydroxyl groups have been designed and synthesized. The sensors in CH3CN exhibit high sensitivity toward F-, H2PO4- and AcO-. The detection limit of S1, S2 and S3 was determined to be 1.25×10-73.62×10-7 mol/L for F-. The sensitivity of sensors S1, S2 and S3 for anions were affected by the configuration, charge density and basicity of anions. 1H NMR titration has been performed to study reaction mechanism, which was considered to be direct consequence of hydrogen-bonding between the phenolic group of sensor and anion.

Key words: azobenzene, colorimetric recognition, anion, chemosensors, phenolic hydroxyl group