Journal article
Three-dimensional Cd(ii) porphyrin metal-organic frameworks for the colorimetric sensing of Electron donors
HM Tay, EJ Goddard, C Hua
Crystengcomm | ROYAL SOC CHEMISTRY | Published : 2022
DOI: 10.1039/d2ce00103a
Abstract
Metalloporphyrins are promising colorimetric sensors for a wide range of small molecule analytes. Three 3D metal-organic frameworks containing metallated 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin (TCPP) with Cd(ii) and 1,2-bis(4-pyridyl)ethylene (bpe) or 1,2-bis(4-pyridyl)diazene (bpaz) featured open square 1D channels decorated with metalloporphyrin units. Exposure of the frameworks to amine vapours resulted in significant shifts in the metalloporphyrin Soret bands, enabling the colorimetric detection of amines. The electron-accepting properties of metalloporphyrin units were additionally exploited for the colorimetric detection of electron-rich species.
Grants
Funding Acknowledgements
We thank Prof. Deanna D'Alessandro at the University of Sydney for the use of the CARY5000 UV-vis-NIR spectrometer. C. H. gratefully acknowledges the University of Melbourne for a McKenzie Fellowship. H. M. T. gratefully acknowledges the Australian Commonwealth Government and the University of Melbourne for a Research Training Programme Scholarship, Rowden White Scholarship and an Elizabeth and Vernon Puzey Scholarship.