| Autor: |
Lakshmi PR; Department of Chemistry, Indian Institute of Technology Palakkad, Palakkad-678557, Kerala, India. shanmugam@iitpkd.ac.in., Mohan B; Department of Chemistry, Indian Institute of Technology Palakkad, Palakkad-678557, Kerala, India. shanmugam@iitpkd.ac.in., Kang P; Department of Chemistry, Indian Institute of Technology Palakkad, Palakkad-678557, Kerala, India. shanmugam@iitpkd.ac.in., Nanjan P; School of Physical Sciences, Amrita Vishwa Vidyapeetham, Mysuru Campus-570026, Karnataka, India. pandurangan@my.amrita.edu., Shanmugaraju S; Department of Chemistry, Indian Institute of Technology Palakkad, Palakkad-678557, Kerala, India. shanmugam@iitpkd.ac.in. |
| Abstrakt: |
Developing low-cost and reliable sensor systems for the detection of trace amounts of toxic gases is an important area of research. Ammonia (NH 3 ) is a commonly produced industrial chemical and a harmful colorless pungent gas released from various manufacturing and processing industries. Continuous exposure to NH 3 vapor causes serious menace to human health, microorganisms, and the ecosystem. Exposure to relatively higher concentrations of NH 3 severely affects the respiratory system and leads to kidney failure, nasal erosion ulcers, and gastrointestinal diseases. Excessive accumulation of NH 3 in the biosphere can cause various metabolic disruptions. As a consequence of this, therefore, suitable sensing methods for selective detection and quantification of trace amounts of NH 3 are of utmost need to protect the environment and living systems. Given this, there have been significant research advances in the preceding years on the development of fluorescence chemosensors for efficient sensing and monitoring of the trace concentration of NH 3 both in solution and vapor phases. This review article highlights several fluorescence chemosensors reported until recently for sensing and quantifying NH 3 in the vapor phase or ammonium ions (NH 4 + ) in the solution phase. The wide variety of fluorescence chemosensors discussed in this article are systematically gathered according to their structures, functional properties, and fluorescence sensing properties. Finally, the usefulness and existing challenges of using the fluorescence-based sensing method for NH 3 detection and the future perspective on this research area have also been highlighted. |
