RhB‐Embedded Zirconium–Naphthalene‐Based Metal–Organic Framework Composite as a Luminescent Self‐Calibrating Platform for the Selective Detection of Inorganic Ions. Issue 7 (24th January 2020)

• Record Type: Journal Article
• Authors: Zhang, Zhinan; Wei, Zihao; Meng, Fanyu; Su, Jiali; Chen, Dashu; Guo, Zhifen; Xing, Hongzhu
• Is Part Of: Chemistry. Volume 26:Issue 7(2020)
• Page Start: 1661
• Page End: 1667
• Publication Date: 2020-01-24
• Subjects: dual emission -- fluorescence -- inorganic ions detection -- metal–organic frameworks -- sensors; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201904448
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: A series of dye@MOF composites were synthesized through in situ encapsulation of luminous rhodamine B (RhB) molecules into a blue‐emissive zirconium–naphthalene‐based metal–organic framework (Zr‐MOF). The fabricated RhB@Zr‐MOF composites exhibit tunable dual‐emissive characteristics due to the process of resonant energy transfer from Zr‐MOF to RhB. Notably, one of the RhB@Zr‐MOF composites (R@D3) exhibited a weak emission at 420 nm and a strong emission at 607 nm, for which the two emissions possess large distinctions in location and intensity and can be referenced with each other in sensing analytes. By using relative fluorescence intensity instead of their absolute fluorescence intensity as the detection signals, R@D3 served as a built‐in self‐calibrated platform to selectively detect Fe 3+ and Cr2 O7 2− ions in water. Compared with the pristine Zr‐MOF, the R@D3 composite shows enhanced sensing selectivity to Fe 3+ and higher sensibility to Cr2 O7 2− . This study displays the advantages of combining organic dyes with robust Zr‐MOFs in tuning fluorescence and sensing performance. Abstract : Analyte detection : Tunable dual‐emissive RhB@Zr‐MOF (RhB=rhodamine B; Zr‐MOF=zirconium–naphthalene‐based metal–organic framework) composites were fabricated by an in situ synthetic encapsulation method. By using relative fluorescence intensity instead of their absolute fluorescence intensity as the detection signals, one of the composites served as a self‐calibrating sensor for detecting Fe 3+ and Cr2 O7 2− .