Abstract
Copper oxides and its salts are now widely used as pesticides to control fungal and bacterial diseases of field crops. Copper toxicity is often a major contributor of human health problems caused through accumulation of excess copper ions in various organs via drinking water, fruits and vegetables. So, detection and estimation of cupric ions in biological organs, drinking water, fruits and vegetables are extremely important. Recently, a fluorescence based sensor using coumarin dye (high quantum yield) has been proposed to detect micromolar Cu++ ion in biological organs. But major problem with coumarin dye is that it is insoluble in water and undergoes dye-dye aggregation in organic solvents. We proposed here a synthetic scheme of preparation of graphene oxide conjugated coumarin dye derivative which would be water dispersible and expected to be an ideal candidate for Cu2+ ion estimation in biological organs and drinking water.
Highlights
Copper salts are extensively used as pesticides to control fungal and bacterial diseases of field crops [1]
Atomic Absorption Spectroscopy (AAS), Inductively Coupled Plasma (ICP-Absorption/Emission) Spectroscopy and electrochemical sensing techniques are currently used for measuring Cu2+ concentration in solution in the nanomolar to micromole range [8]-[11]
We would propose to design synthetic scheme of coumarin conjugated Graphene Oxide (GO) nanomaterial. This design will take advantage of the high selectivity of the coumarin derivative towards Cu2+ ions as reported in the literature [30] and minimize the self-quenching problem. This is a feasible strategy as the coumarin dye will be covalently attached to GO surface and this attachment will hinder the formation of J-aggregation of coumarin dye molecules
Summary
Copper salts are extensively used as pesticides (i.e. fungicide/bactericides) to control fungal and bacterial diseases of field crops [1]. (2014) Design and Synthetic Scheme of Water Dispersible Graphene Oxide-Coumarin Complex for Ultra-Sensitive Fluorescence Based Detection of Copper (Cu2+) Ion in Aqueous Environment. A number of neurodegenerative diseases including Alzheimer are linked to disturbance in Cu mediated metabolism processes [5] [6]. Other diseases such as Aceruloplasminemia [7], Wilson’s and Menki’s syndrome has been related to Cu imbalance. Some of important applications of the proposed probe in the environment would include monitoring of i) residual Cu pesticides in the plant surface (leaves and stems and fruits), ii) agricultural soil samples and iii) Cu level in contaminated water
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