Design and synthesis of luminescent porous coordination polymers for chromaticity modulation, sensing of nitrobenzene and iodine encapsulation

• Published in: CrystEngComm Vol. 18; no. 30; pp. 5639 - 5646
• Main Authors: Wang, Haijun, Cheng, Fujun, Zou, Changchang, Li, Qianqian, Hua, Yinying, Duan, Jingui, Jin, Wanqin
• Format: Journal Article
• Language: English
• Published: 01.01.2016
• Subjects: Chromaticity; Conjugation; Coordination polymers; Design analysis; Encapsulation; Modulation; Nitrobenzenes; Self assembly
• ISSN: 1466-8033; 1466-8033
• DOI: 10.1039/C6CE00960C

We design and prepare a family of luminescent porous coordination polymers (PCPs) constructed from three C 2v symmetry ligands with increased conjugation moieties. Single crystal X-ray analyses revealed that their pore types/sizes and volumes were systematically tuned. Eu-based NTU-5 and NTU-8 emit red light. However, in contrast to the typical green emission of Tb-based PCPs, the increased conjugation moieties in NTU-6 and NTU-9 with a Tb center resulted in a very unusual blue emission. These unique emissions from these iso-structures demonstrated varied pathways of electronic transfer, which were further confirmed by lifetime experiments. Encouraged by these observations, the chromaticity modulation from pink to blue has been well realized by a facile method of self-assembly of the Te-H 3 L ligand and varied molar ratios of Eu 3+ /Tb 3+ ions. Additionally, NTU-6 and NTU-9 showed high potential for nitrobenzene sensing (quenching effect coefficients: 589.5 and 445.6 M −1 ) and encapsulation of I 2 molecules.