A phenylene–vinylene terpyridine conjugate fluorescent probe for distinguishing Cd2+ from Zn2+ with high sensitivity and selectivity

Terpyridine Functionalized Oligothiophene: Cadmium(II) Ion Sensing via Visualization and Fluorescence

“…Importantly, probe 3T‐Terpy provided better selectivity for detecting Cd 2+ . More interestingly, treatment with Cd 2+ elicited a slight ‘turn‐on’ fluorescence response by ca .1.2 fold due to blocking of ICT via metal ion coordination which can be defined as metal chelation enhanced fluorescence effect ,. It is to be noted that the recognition process of Cd 2+ by 3T‐terpy can be gradually restored via introduction of excess EDTA, which can be explained by the difference in the association constant between EDTA‐Cd 2+ and 3T‐Terpy‐Cd 2+ (Figure S6) .…”

“…Thus, development of highly selective and sensitive fluorescent chemosensor of Cd 2+ is still a challenge. It is known that 2,2′:6′,2′′‐terpyridine (Terpy) is a powerful chelating structure to various transition metal ions, and its coordination chemistry has been studied for many years ,. To our knowledge, most of the fluorescent sensors bearing Terpy groups as the binding units are based on the photoinduced electron transfer (PET) mechanism, which usually led to the increase of fluorescence while bind with metal ions.…”

A turn‐off fluorescence probe based on terpyridine for pH monitoring

“…Terpyridine has a greater π‐conjugation and stronger electron‐withdrawing ability than pyridine. At the same time, terpyridine is also a common recognition group in fluorescence probes . In the present study, we report a new fluorescent probe by combining TB and terpyridine.…”

A New Fluorescent Probe for Selective Cd2+ Detection and Cell Imaging

“…Recently, fluorescent probes for detecting metal ions have been interested by researchers for their advantages, just like high sensitivity, briefness, and real‐time detection . So far, many fluorescent sensors are designed and synthesized for the Cd 2+ detection . However, most of them bear the problem of selectivity due to other metal ions with similar chemical structures, such as Zn 2+ , which interfere the recognition.…”