Luminescent coordination polymers constructed using a mixed-ligand strategy for highly selective luminescence sensing of nitrobenzene, Fe 3+ and Cr 2 O 7 2− ions and photodegradation of rhodamine B

• Published in: CrystEngComm 2020-07, Vol.22 (27), p.4650-4664
• Main Authors: Wang, Jun-Jie, Wu, Fei-Fan, Su, Ning, Li, Pan-Pan, Wang, Si-Yin, Ma, Hui-Yan, Li, Yun-Wu, Yu, Mei-Hui
• Format: Article
• Language: English
• ISSN: 1466-8033; 1466-8033
• DOI: 10.1039/D0CE00677G

Using a mixed ligand strategy, ten new luminescent coordination polymers (LCPs), namely, [Cd(IPA-NH 2 )(Htpim)] n ( 1 ), [Mn(IPA-NH 2 )(Htpim)] n ( 2 ), [Zn(IPA-OH)(Htpim)] n ( 3 ), [Cd(IPA-OH)(Htpim)] n ( 4 ), {[Zn(Htpim) 2 (H 2 O) 2 ](IPA-OH)} n ( 5 ), {[Cd(Htpim) 2 (H 2 O) 2 ](IPA-OH)} n ( 6 ), [Cd(IPA-NO 2 )(Htpim)] n ( 7 ), [Zn 2 (PMA)(Htpim) 2 ] n ( 8 ), [Cd 2 (PMA)(Htpim) 2 ] n ( 9 ) and [Cu(H 2 PMA)(Htpim) 2 (H 2 O)] n ( 10 ) (Htpim = 2,4,5-tri(4-pyridyl)-imidazole, H 2 IPA-NH 2 = 5-aminoisophthalic acid, H 2 IPA-OH = 5-hydroxyisophthalic acid, H 2 IPA-NO 2 = 5-nitroisophthalic acid, H 4 PMA = 1,2,4,5-benzenetetracarboxylic acid) were constructed. Compounds 1–4 and 7–9 have similar 2D 4 4 networks, while 5 , 6 and 10 show 1D chain structures. The results reveal that the coordination configuration of M( ii ), carboxylic acids, and coordinated water molecules play pivotal roles in the formation of the final structures. Moreover, the selective luminescence sensing and photocatalytic performances of 1–10 were also studied. Interestingly, they can sensitively detect trace amounts of nitrobenzene (NB), Cr 2 O 7 2− or Fe 3+ through luminescence quenching. In addition, 3–10 show high photocatalytic activities toward the degradation of rhodamine B (RhB).