2-Hexylaminoethylamidonaphthalimide as Cu2+ sensor

Area of Science:

• Organic Chemistry
• Analytical Chemistry
• Materials Science

Background:

• Naphthalimide derivatives are known for their fluorescent properties.
• Development of selective and sensitive probes for metal ion detection is crucial in environmental and biological monitoring.
• Copper ions (Cu2+) play vital roles in biological systems but can be toxic at elevated levels.

Purpose of the Study:

• To synthesize novel fluorescent hexylaminoalkylamidonaphthalimides.
• To investigate the relationship between the structure of these compounds and their fluorescence properties.
• To develop a selective and sensitive fluorogenic probe for the detection of copper ions (Cu2+).

Main Methods:

• Synthesis of a series of hexylaminoalkylamidonaphthalimide compounds.
• Investigation of fluorescence intensity and spectral properties in various solvents.
• Evaluation of the developed probe (2-hexylaminoethylamidonaphthalimide) as a fluorescent chemosensor for Cu2+ at pH 7.4.

Main Results:

• Fluorescence intensity correlated directly with the number of carbons in the alkyl chain.
• 2-hexylaminoethylamidonaphthalimide demonstrated high selectivity and affinity for Cu2+ in aqueous solutions.
• The probe achieved sensitive detection of Cu2+ down to the 0.1 μM range.

Conclusions:

• Hexylaminoalkylamidonaphthalimides represent a promising class of fluorescent materials.
• 2-hexylaminoethylamidonaphthalimide functions as an effective bidentate fluorescent chemosensor for Cu2+.
• This developed method offers a highly sensitive technique for detecting Cu2+ in aqueous environments.