TY - JOUR
T1 - Enhanced sensing ability of fluorescent chemosensors with triphenylamine-functionalized conjugated polyfluorene
AU - Juang, Ruey Shin
AU - Wen, Hua Wen
AU - Chen, Meng Tsz
AU - Yang, Po Chih
N1 - Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/8/1
Y1 - 2016/8/1
N2 - This paper reports the multifunctional responsive fluorescence chemosensory phenomena of two terpyridine-functionalized conjugated polyfluorenes (PFs), poly[2,7-(9,9-dihexylfluorene)-alt-4′-((4-[N,N-(4-phenyl)amino]styryl)phenyl)-2,2′:6′,2″-terpyridine] (P1) and poly[2,7-(9,9-dihexylfluorene)-alt-4′-phenyl-2,2′:6′,2″-terpyridine] (P2), which were exposed to solvents, metal ions, and protons through Suzuki polymerization. Compared with P2, P1 exhibited enhanced sensing ability that resulted from efficient interactions between the specific triphenylamine-linked terpyridine units with protons and metal ions. P1 and P2 both showed high sensitivity toward Cu2+, with the Stern-Volmer constants of 2.30 × 105 M-1 and 1.05 × 105 M-1, respectively. Because of the very high stability constants of the CN--Cu2+ complexes, the fluorescence of P1 and P2 solutions that were quenched by Cu2+ recovered upon addition of trace CN-, with a detection limit as low as 3.7 × 10-6 M-1 and 5.2 × 10-6 M-1 for P1 and P2, respectively. P1 showed fluorescence quenching when pH decreased from 5.0 to 1.0; however, a pH of 13.0 had little effect on fluorescence intensity. Our results suggest that P1 is a promising material for chemosensory applications.
AB - This paper reports the multifunctional responsive fluorescence chemosensory phenomena of two terpyridine-functionalized conjugated polyfluorenes (PFs), poly[2,7-(9,9-dihexylfluorene)-alt-4′-((4-[N,N-(4-phenyl)amino]styryl)phenyl)-2,2′:6′,2″-terpyridine] (P1) and poly[2,7-(9,9-dihexylfluorene)-alt-4′-phenyl-2,2′:6′,2″-terpyridine] (P2), which were exposed to solvents, metal ions, and protons through Suzuki polymerization. Compared with P2, P1 exhibited enhanced sensing ability that resulted from efficient interactions between the specific triphenylamine-linked terpyridine units with protons and metal ions. P1 and P2 both showed high sensitivity toward Cu2+, with the Stern-Volmer constants of 2.30 × 105 M-1 and 1.05 × 105 M-1, respectively. Because of the very high stability constants of the CN--Cu2+ complexes, the fluorescence of P1 and P2 solutions that were quenched by Cu2+ recovered upon addition of trace CN-, with a detection limit as low as 3.7 × 10-6 M-1 and 5.2 × 10-6 M-1 for P1 and P2, respectively. P1 showed fluorescence quenching when pH decreased from 5.0 to 1.0; however, a pH of 13.0 had little effect on fluorescence intensity. Our results suggest that P1 is a promising material for chemosensory applications.
KW - Chemosensor
KW - Conjugated polymer
KW - Terpyridine
KW - Triphenylamine
UR - http://www.scopus.com/inward/record.url?scp=84961842130&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2016.03.053
DO - 10.1016/j.snb.2016.03.053
M3 - 文章
AN - SCOPUS:84961842130
SN - 0925-4005
VL - 231
SP - 399
EP - 411
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -