title: Ionic complex of a rhodamine dye with aggregation-induced emission properties.
abstract: An AIE-active rhodamine based luminogen was prepared via a complexation reaction between non-emissive rhodamine hydrazide (RdH) and bulky camphorsulfonic acid (CSA). Besides acting to open the spirolactam ring of RdH, CSA also imposes a rotational restriction on the resultant ionic complex, RdH(CSA)x. Without CSA, the analogous complex RdH(HCl)3is a luminogen with aggregation-caused quenching (ACQ) properties. The ionic bonds of RdH(CSA)3are sensitive to several external stimuli and therefore it is a luminescent sensor for metal ions, organic amines and the blood protein bovine serum albumin (BSA). Besides being a sensor for BSA, the ionic RdH(CSA)3is also a denaturant capable of uncoiling the peptide chain of BSA.
authors.affiliation: Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan, Republic of China. jlhong@mail.nsysu.edu.tw.
authors.forename: Pei-Yi
authors.initials: PY
authors.lastname: Huang
authors.affiliation: Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan, Republic of China. jlhong@mail.nsysu.edu.tw.
authors.forename: Jhen-Yan
authors.initials: JY
authors.lastname: Gao
authors.affiliation: Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan, Republic of China. jlhong@mail.nsysu.edu.tw.
authors.forename: Cheng-Yu
authors.initials: CY
authors.lastname: Song
authors.affiliation: Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan, Republic of China. jlhong@mail.nsysu.edu.tw.
authors.forename: Jin-Long
authors.initials: JL
authors.lastname: Hong
mesh_terms: D000588:Amines / Q000032:analysis*; D000818:Animals; D002417:Cattle; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D007477:Ions / Q000138:chemical synthesis / Q000737:chemistry; D008670:Metals / Q000032:analysis*; D015394:Molecular Structure; D012235:Rhodamines / Q000138:chemical synthesis / Q000737:chemistry*; D012710:Serum Albumin, Bovine / Q000032:analysis*
chemical_list: D000588:Amines; D005456:Fluorescent Dyes; D007477:Ions; D008670:Metals; D012235:Rhodamines; D012710:Serum Albumin, Bovine