TY - JOUR
T1 - Dual-response luminescent probe for Zn-based coordination polymers with sensitive detection of vitamin C and salicylic acid
AU - Lu, Lu
AU - Zhong, Xin
AU - Ansari, Istikhar A.
AU - Jadoun, Sapana
AU - Ayue, Yiguo
AU - Bellini, Marco
AU - Li, Xiangxiang
AU - Muddassir, Mohd
AU - Wang, Jun
AU - Guo, Jian
N1 - Publisher Copyright:
© 2026 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
PY - 2026/7
Y1 - 2026/7
N2 - Two Zn(II)-based coordination polymers (CPs), [Zn3(L1)2(Bpe)2Cl2]n (1) and [Zn2(L2)2(Bpe)(H2O)2]n (2) (Bpe = 1,2-bis(4-pyridyl)ethylene; H2L1 = 4,4′-(1,2-phenylenebis(methyleneoxy))dibenzoic acid; H2L2 = 3,5-bis(3′-carboxyphenyl)-1,2,4-triazole), were synthesized via solvothermal methods and subsequently characterized by FT-IR, powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), and single-crystal X-ray diffraction. Crystallographic investigations reveal that the Zn(II) centres adopt distorted trigonal bipyramidal coordination environments. The resulting frameworks are constructed through the coordination of carboxylate groups in combination with N-donor Bpe linkers, leading to extended polymeric architectures. Both CPs display significant luminescence behavior and were further assessed as fluorescent probes for the detection of biomolecular species. Among the tested analytes, vitamin C (AA) induces significant fluorescence quenching with Ksv values of 4.80 × 103 M−1 for (1) and 1.73 × 104 M−1 for (2). The quenched systems further display turn-on fluorescence recovery toward salicylic acid, enabling a dual-response sensing system. Mechanistic investigations suggest that the fluorescence quenching predominantly arises from an inner filter effect (IFE)-dominated process.
AB - Two Zn(II)-based coordination polymers (CPs), [Zn3(L1)2(Bpe)2Cl2]n (1) and [Zn2(L2)2(Bpe)(H2O)2]n (2) (Bpe = 1,2-bis(4-pyridyl)ethylene; H2L1 = 4,4′-(1,2-phenylenebis(methyleneoxy))dibenzoic acid; H2L2 = 3,5-bis(3′-carboxyphenyl)-1,2,4-triazole), were synthesized via solvothermal methods and subsequently characterized by FT-IR, powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), and single-crystal X-ray diffraction. Crystallographic investigations reveal that the Zn(II) centres adopt distorted trigonal bipyramidal coordination environments. The resulting frameworks are constructed through the coordination of carboxylate groups in combination with N-donor Bpe linkers, leading to extended polymeric architectures. Both CPs display significant luminescence behavior and were further assessed as fluorescent probes for the detection of biomolecular species. Among the tested analytes, vitamin C (AA) induces significant fluorescence quenching with Ksv values of 4.80 × 103 M−1 for (1) and 1.73 × 104 M−1 for (2). The quenched systems further display turn-on fluorescence recovery toward salicylic acid, enabling a dual-response sensing system. Mechanistic investigations suggest that the fluorescence quenching predominantly arises from an inner filter effect (IFE)-dominated process.
KW - Dual-response fluorescence
KW - Inner filter effect (IFE)
KW - Luminescent sensing
KW - Salicylic acid sensing
KW - Vitamin C detection
UR - https://www.scopus.com/pages/publications/105043699378
U2 - 10.1016/j.mtchem.2026.103837
DO - 10.1016/j.mtchem.2026.103837
M3 - Article
AN - SCOPUS:105043699378
SN - 2468-5194
VL - 55
JO - Materials Today Chemistry
JF - Materials Today Chemistry
M1 - 103837
ER -