Cargando…
Structure-switching M(3)L(2) Ir(iii) coordination cages with photo-isomerising azo-aromatic linkers
Cyclotriguaiacylene has been functionalised with 3- or 4-pyridyl-azo-phenyl groups to form a series of molecular hosts with three azobenzene-type groups that exhibit reversible photo-isomerisation. Reaction of the host molecules with [Ir(C^N)(2)(NCMe)(2)](+) where C^N is the cyclometallating 2-pheny...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Royal Society of Chemistry
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6238882/ https://www.ncbi.nlm.nih.gov/pubmed/30542566 http://dx.doi.org/10.1039/c8sc03499k |
_version_ | 1783371471939174400 |
---|---|
author | Oldknow, Samuel Martir, Diego Rota Pritchard, Victoria E. Blitz, Mark A. Fishwick, Colin W. G. Zysman-Colman, Eli Hardie, Michaele J. |
author_facet | Oldknow, Samuel Martir, Diego Rota Pritchard, Victoria E. Blitz, Mark A. Fishwick, Colin W. G. Zysman-Colman, Eli Hardie, Michaele J. |
author_sort | Oldknow, Samuel |
collection | PubMed |
description | Cyclotriguaiacylene has been functionalised with 3- or 4-pyridyl-azo-phenyl groups to form a series of molecular hosts with three azobenzene-type groups that exhibit reversible photo-isomerisation. Reaction of the host molecules with [Ir(C^N)(2)(NCMe)(2)](+) where C^N is the cyclometallating 2-phenylpyridinato, 2-(4-methylphenyl)pyridinato or 2-(4,5,6-trifluorophenyl)pyridinato results in the self-assembly of a family of five different [{Ir(C^N)(2)}(3)(L)(2)](3+) coordination cages. Photo-irradiation of each of the cages with a high energy laser results in E → Z photo-isomerisation of the pyridyl-azo-phenyl groups with up to 40% of groups isomerising. Isomerisation can be reversed by exposure to blue light. Thus, the cages show reversible structure-switching while maintaining their compositional integrity. This represents the largest photo-induced structural change yet reported for a structurally-integral component of a coordination cage. Energy minimised molecular models indicate a switched cage has a smaller internal space than the initial all-E isomer. The [Ir(C^N)(2)(NCMe)(2)](+) cages are weakly emissive, each with a deep blue luminescence at ca. 450 nm. |
format | Online Article Text |
id | pubmed-6238882 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-62388822018-12-12 Structure-switching M(3)L(2) Ir(iii) coordination cages with photo-isomerising azo-aromatic linkers Oldknow, Samuel Martir, Diego Rota Pritchard, Victoria E. Blitz, Mark A. Fishwick, Colin W. G. Zysman-Colman, Eli Hardie, Michaele J. Chem Sci Chemistry Cyclotriguaiacylene has been functionalised with 3- or 4-pyridyl-azo-phenyl groups to form a series of molecular hosts with three azobenzene-type groups that exhibit reversible photo-isomerisation. Reaction of the host molecules with [Ir(C^N)(2)(NCMe)(2)](+) where C^N is the cyclometallating 2-phenylpyridinato, 2-(4-methylphenyl)pyridinato or 2-(4,5,6-trifluorophenyl)pyridinato results in the self-assembly of a family of five different [{Ir(C^N)(2)}(3)(L)(2)](3+) coordination cages. Photo-irradiation of each of the cages with a high energy laser results in E → Z photo-isomerisation of the pyridyl-azo-phenyl groups with up to 40% of groups isomerising. Isomerisation can be reversed by exposure to blue light. Thus, the cages show reversible structure-switching while maintaining their compositional integrity. This represents the largest photo-induced structural change yet reported for a structurally-integral component of a coordination cage. Energy minimised molecular models indicate a switched cage has a smaller internal space than the initial all-E isomer. The [Ir(C^N)(2)(NCMe)(2)](+) cages are weakly emissive, each with a deep blue luminescence at ca. 450 nm. Royal Society of Chemistry 2018-09-06 /pmc/articles/PMC6238882/ /pubmed/30542566 http://dx.doi.org/10.1039/c8sc03499k Text en This journal is © The Royal Society of Chemistry 2018 http://creativecommons.org/licenses/by/3.0/ This article is freely available. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0) |
spellingShingle | Chemistry Oldknow, Samuel Martir, Diego Rota Pritchard, Victoria E. Blitz, Mark A. Fishwick, Colin W. G. Zysman-Colman, Eli Hardie, Michaele J. Structure-switching M(3)L(2) Ir(iii) coordination cages with photo-isomerising azo-aromatic linkers |
title | Structure-switching M(3)L(2) Ir(iii) coordination cages with photo-isomerising azo-aromatic linkers
|
title_full | Structure-switching M(3)L(2) Ir(iii) coordination cages with photo-isomerising azo-aromatic linkers
|
title_fullStr | Structure-switching M(3)L(2) Ir(iii) coordination cages with photo-isomerising azo-aromatic linkers
|
title_full_unstemmed | Structure-switching M(3)L(2) Ir(iii) coordination cages with photo-isomerising azo-aromatic linkers
|
title_short | Structure-switching M(3)L(2) Ir(iii) coordination cages with photo-isomerising azo-aromatic linkers
|
title_sort | structure-switching m(3)l(2) ir(iii) coordination cages with photo-isomerising azo-aromatic linkers |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6238882/ https://www.ncbi.nlm.nih.gov/pubmed/30542566 http://dx.doi.org/10.1039/c8sc03499k |
work_keys_str_mv | AT oldknowsamuel structureswitchingm3l2iriiicoordinationcageswithphotoisomerisingazoaromaticlinkers AT martirdiegorota structureswitchingm3l2iriiicoordinationcageswithphotoisomerisingazoaromaticlinkers AT pritchardvictoriae structureswitchingm3l2iriiicoordinationcageswithphotoisomerisingazoaromaticlinkers AT blitzmarka structureswitchingm3l2iriiicoordinationcageswithphotoisomerisingazoaromaticlinkers AT fishwickcolinwg structureswitchingm3l2iriiicoordinationcageswithphotoisomerisingazoaromaticlinkers AT zysmancolmaneli structureswitchingm3l2iriiicoordinationcageswithphotoisomerisingazoaromaticlinkers AT hardiemichaelej structureswitchingm3l2iriiicoordinationcageswithphotoisomerisingazoaromaticlinkers |