naa a22 4500 510733662 CHVBK 20180411083002.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s12039-013-0500-0 doi (NATIONALLICENCE)springer-10.1007/s12039-013-0500-0 Synthesis, characterization and ion recognition studies of lower rim 1,3-di{rhodamine} conjugate of calix[4]arene [Elektronische Daten] [JUGUN CHINTA, JAYARAMAN DESSINGOU, CHEBROLU RAO] An amido-linked rhodamine conjugate of calix[4]arene, L has been synthesized and characterized. Metal ion recognition properties of L have been studied by emission and absorption techniques with 14 different metal ions including the transition ones. Results show that, L exhibits ratiometric emission intensity towards Hg2+, Fe2+, Fe3+, Cu2+, Pb2+ and Zn2+. Composition of the complex formed in the solution has been found to be 1:2 (L:Mn + ), based on the Job's plot. The L can also act as a chemosensor for Hg2+ through naked eye detection. Fluorescence quenching observed at 485 nm follows an order, Hg2+ > > Fe3+ ~ Cu2+ > Zn2+ > Pb2+ > Ca2+, while the enhancement observed at 580 nm follows, Hg2+ > > Fe2+ ~ Pb2+ > Zn2+. Mode of interaction of Mn +  with L is by the ring opening of spirolactam moiety. Graphical Abstract An amido-linked rhodamine conjugate of calix[4]arene, L has been synthesized and characterized and was shown to exhibit ratiometric emission towards Hg2+, Fe2+, Fe3+, Cu2+, Pb2+ and Zn2+. L can act as a chemosensor for Hg2+ by showing a colour change and by forming a 1:2 L:M n+ complex while opening the spirolactam moiety. Indian Academy of Sciences, 2013 Rhodamine conjugate of calix[4]arene nationallicence ratiometric sensor for Hg2+ nationallicence ion recognition nationallicence emission and absorption titrations nationallicence CHINTA JUGUN Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, 400 076, Powai, Mumbai, India aut DESSINGOU JAYARAMAN Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, 400 076, Powai, Mumbai, India aut RAO CHEBROLU Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, 400 076, Powai, Mumbai, India aut Journal of Chemical Sciences Springer India 125/6(2013-11-01), 1455-1461 0974-3626 125:6<1455 2013 125 12039 https://doi.org/10.1007/s12039-013-0500-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12039-013-0500-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- CHINTA JUGUN Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, 400 076, Powai, Mumbai, India aut NATIONALLICENCE 700 1- DESSINGOU JAYARAMAN Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, 400 076, Powai, Mumbai, India aut NATIONALLICENCE 700 1- RAO CHEBROLU Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, 400 076, Powai, Mumbai, India aut NATIONALLICENCE 773 0- Journal of Chemical Sciences Springer India 125/6(2013-11-01), 1455-1461 0974-3626 125:6<1455 2013 125 12039 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer