Synthesis and fluorescent properties of novel chiral 1,2-diaminocyclohexane substituted ligands and their complexes

A series of novel chiral 1,2-diaminocyclohexane derivatives bearing heterocyclic units were synthesized via improved methods under ultrasonic irradiation. The photophysical properties of compounds were studied in ethanol, methanol, and chloroform. The sensitivity of these amines toward Cu2+, Cd2+, and Ni2+ was studied by the UV-vis and fluorescent methods. The π-electron structure of thiophene and bithiophene containing sensors is the most active toward all above mentioned metal ions and is highly selective for Ni2+ and Cd2+.