Quinoline-Benzimidazole Conjugate Based Fluorescent Chemosensor: A Ratiometric Sensor for the Differentiation of Rutile and Anatase TiO2 Nanoparticles

Authors

  • K. Velmurugan Fluorensic Materials Laboratory, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India and College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, P.R. China.
  • S. Suguna Fluorensic Materials Laboratory, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India.
  • I. Sheebha Department of Applied Physics, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India.
  • C. Immanuel David Fluorensic Materials Laboratory, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India.
  • B. Vidhya Department of Applied Physics, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India.
  • J. Prabhu Fluorensic Materials Laboratory, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India.
  • R. Nandhakumar Fluorensic Materials Laboratory, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University), Karunya Nagar, Coimbatore- 641114, India.

DOI:

https://doi.org/10.9734/bpi/nicb/v7/1684B

Keywords:

Chemosensor, TiO2, quinoline, benzimidazole, fluorescence, ratiometric

Abstract

A quinoline-benzimidazole conjugate 1 has been synthesized and characterized by the usual spectroscopic and analytical data. The probe is utilized for the discrimination of TiO2 anatase and rutile nanoparticles by the spectrofluorimetry technique as a potential fluorescent chemosensor. Probe 1 exhibits selective TiO2 sensing through a photoinduced electron transfer process (PET) and the ratiometric sensing response by intramolecular charge transfer (ICT) mechanism. A 1:2 binding ratio was arrived with the help of fluorescence titration data of TiO2 rutile and anatase phases with conjugate 1 and the association constant (Ka) of 1+TiO2 anatase and 1+TiO2 rutile were computed to be 6.34 × 104 M-2 and 5.179 × 104 M-2, respectively. The limit of detection of TiO2 nanoparticles by probe 1 was up to micro molar concentrations. The effect of time and pH were also recorded. Hence, the probe 1 can potentially be applied to the environmental and biological samples.

Published

2022-02-18

How to Cite

K. Velmurugan, S. Suguna, I. Sheebha, C. Immanuel David, B. Vidhya, J. Prabhu, & R. Nandhakumar. (2022). Quinoline-Benzimidazole Conjugate Based Fluorescent Chemosensor: A Ratiometric Sensor for the Differentiation of Rutile and Anatase TiO2 Nanoparticles. New Innovations in Chemistry and Biochemistry Vol. 7, 13–25. https://doi.org/10.9734/bpi/nicb/v7/1684B

Issue

New Innovations in Chemistry and Biochemistry Vol. 7

Section

Chapters