Exploring Various Photochemical Processes in Optical Sensing of Pesticides by Luminescent Nanomaterials: A Concise Discussion on Challenges and Recent Advancements

Abstract

Food safety is a burning global issue in this present era. The prevalence of harmful food additives and contaminants in everyday food is a significant cause for concern as they can adversely affect human health. More particularly, among the different food contaminants, the use of excessive pesticides in agricultural products is severely hazardous. So, the optical detection of residual pesticides is an effective strategy to counter the hazardous effect and ensure food safety. In this perspective, nanomaterials have played a leading role in defending the open threat against food safety instigated by the reckless use of pesticides. Now, nanomaterial-based optical detection of pesticides has reached full pace and needs an inclusive discussion. This Review covers the advancement of photoprocess-based optical detection of pesticides categorically using nanomaterials. Here, we have thoroughly dissected the photoprocesses (aggregation and aggregation-induced emission (AIE), charge transfer and intramolecular charge transfer (ICT), electron transfer and photoinduced electron transfer (PET), fluorescence resonance energy transfer (FRET), hydrogen bonding, and inner filter effect) and categorically demarcated their significant role in the optical detection of pesticides by luminescent nanomaterials over the last few years.

Recent Advances of Food Hazard Detection Based on Artificial Nanochannel Sensors

“…The rational use of additives can improve the flavor of food, prolong the storage period, improve the quality of food visually and tastefully, and thus promote the sales of food. , However, the excessive use of food additives and the wrong use of food additives will cause food safety problems and seriously endanger people’s health. For example, the flavoring agent’s pyrophosphate and sodium pyrophosphate not only have a good freshness effect on food, but also have the effect of enhancing the flavor and emulsification of food products, but these two salts are toxic and will cause serious harm to the human body after illegal use.…”

AIE active fluorescent organic nanoparticles based optical detection of Cu2+ ions in pure water: a case of aggregation–disaggregation reversibility

“…1–4 Now, among common Cu 2+ ion detection techniques like inductively coupled plasma mass spectroscopy (ICP-MS), 6 atomic absorption spectrometry, 7 inductively coupled plasma atomic emission spectrometry (ICP-AES), 8 anodic stripping voltammetry (ASV), 9 and voltammetry, 10 fluorescent detection has shown some additional benefits like low-cost and reusable chemosensors, excellent selectivity, sufficient sensitivity, ease of operation, and biocompatible in vivo detection. 11–25 Naturally, fluorescent detection of Cu 2+ ion in 100% aqueous medium is the need of the hour. Besides, copper plays dual-directional reverse roles with some positive and negative impacts.…”

Recent developments in pyrene-based fluorescence recognition and imaging of Ag+ and Pb2+ ions: Synthesis, applications and challenges

“…The colorimetric and fluorescence detection of different kinds of analytes has become a convenient tool of the modern era for several reasons, including high selectivity and sensitivity, the naked-eye colour change phenomenon, low technical need and expense, rapid response, low toxicity, and in vivo and in vitro compatibility. [1][2][3][4][5][6] As a result, these strategies have now been widely employed in the detection of a broad range of important analytes in biology, physiology, medicine, pharmacology and environmental sciences. 1 In recent years, pyrene-based optical probes have received enormous attention due to their efficacy in a wide range of applications, including fluorescence studies, [7][8][9] environmental monitoring, 10 bioimaging 11 and organic electronics.…”