Key Laboratory of Coordination Chemistry and Functional Materials in Universities of Shandong, Dezhou University, Dezhou 253023, China.
Photochem Photobiol Sci. 2013 Nov;12(11):2001-7. doi: 10.1039/c3pp50126d.
One new azacrown[N,S,O]-modified metal-free porphyrin derivative, H2Por-azacrown (1), with the central tetrapyrrole moiety as signaling fluorophore and/or metal ion receptor has been designed, synthesized, and characterized. Addition of Ag(+) into this novel metal-free porphyrin compound induces a fluorescence ON-OFF process, while adding Pb(2+) leads to absorption/emission-ratiometric signals. Quite interestingly, blue-shift of the Soret band, ratiometric change of Q bands, and dual-signal changes (absorption ratio and fluorescence ON-OFF) associated with the Cu(2+) displacement from the 1-Pb(2+) system were observed upon addition of Cu(2+). These results render this H2Por-azacrown compound a porphyrin-based multi-responsive optical sensor towards Ag(+), Pb(2+), and in particular Cu(2+) with dual-mode detecting potential.
一种新型的氮杂冠[N，S，O]-修饰的无金属卟啉衍生物，H2Por-azacrown（1），其中心四吡咯部分作为信号荧光团和/或金属离子受体被设计、合成和表征。向这种新型无金属卟啉化合物中加入 Ag(+) 会诱导荧光 ON-OFF 过程，而加入 Pb(2+) 则会导致吸收/发射比信号。有趣的是，当 Cu(2+) 取代 1-Pb(2+) 体系中的 Pb(2+)时，观察到 Soret 带的蓝移、Q 带的比率变化以及与 Cu(2+) 置换相关的双信号变化（吸收比和荧光 ON-OFF）。这些结果表明，这种 H2Por-azacrown 化合物是一种基于卟啉的多响应光学传感器，可用于检测 Ag(+)、Pb(2+)，特别是具有双模式检测潜力的 Cu(2+)。
