title: A new highly selective, ratiometric and colorimetric fluorescence sensor for Cu(2+) with a remarkable red shift in absorption and emission spectra based on internal charge transfer.
abstract: A new 1,8-diaminonaphthalene based ratiometric and highly selective colorimetric "off-on" type of fluorescent probe, receptor 2 has been designed and synthesized that senses only Cu(2+) among the other heavy and transition metal ions examined on the basis of internal charge transfer (ICT). The visual sensitivity of the receptor 2 is remarkable, showing dual color changes from colorless (receptor) to purple followed by blue and a large red shift in emission upon Cu(2+) complexation.
authors.affiliation: Department of Chemistry, Bengal Engineering and Science University, Shibpur, Howrah 711 103, India. spgoswamical@yahoo.com
authors.forename: Shyamaprosad
authors.initials: S
authors.lastname: Goswami
authors.forename: Debabrata
authors.initials: D
authors.lastname: Sen
authors.forename: Nirmal Kumar
authors.initials: NK
authors.lastname: Das
mesh_terms: D015081:2-Naphthylamine / Q000031:analogs & derivatives* / Q000737:chemistry; D003124:Colorimetry / Q000379:methods*; D003300:Copper / Q000032:analysis*; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D013056:Spectrophotometry, Ultraviolet
chemical_list: D005456:Fluorescent Dyes; D003300:Copper; D015081:2-Naphthylamine; C508862:1,8-diaminonaphthalene