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Unprecedented Chemosensing Behavior of Novel Tetra-Substituted Benzimidazole zinc(II) Phthalocynine for Selective Detection of Bi

Unprecedented Chemosensing Behavior of Novel Tetra-Substituted Benzimidazole zinc(II) Phthalocynine for Selective Detection of Bi

Azeem Ullah, Faheem Shah, Imran Khan, Muhammad Anwar, Kiramat Shah, Munira Taj Muhammad, Farid Ahmad

Spectrochim Acta A Mol Biomol Spectrosc. 2018 Mar 5;192:188-193.

PMID: 29136584

Abstract:

In this work, synthesis of novel symmetrical 4-(2-bromo-4-(5-bromo-1H-benzo[d] imidazol-2-yl) phenoxy) tetra substituted zinc phthalocyanine has been reported. The novel benzimidazole zinc phthlocynine compound (3) has been characterized by MALDI-TOF MS, FT-IR, UV-vis, and 1H NMR spectroscopy. This new compound 3 displayed excellent selectivity towards Bi3+ ion in the presence of other competitive ions including Ca2+, Cd2+, Co2+ Cu2+, Fe3+, Hg2+, Sn2+, Mg2+, Na+, Ni2+ and Pb2+ respectively. Upon addition of Bi3+ into the solution of compound 3 in DMSO, dramatic change was observed in the Q- and the B-bands in UV-visible spectra as a result of donor acceptor interactions. Reactive oxygen species (ROS) were also studied using 2,7-dichlorofluorescin diacetate (DCFH-DA) a fluorescent probe which is converted to highly fluorescent dichlorofluorescein (DCF) in the presence of ROS. This property of non-aggregating zinc phthalocyanine is promising as a photosensitizer in photodynamic therapy of cancer.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP4091990	2ʹ,7ʹ-Dichlorofluorescin Diacetate - CAS 4091-99-0		4091-99-0	Price

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