Ferrer Ribera, RB.; Alvaro Rodríguez, MM.; Baldovi, HG.; Reinsch, H.; Stock, N. (2014). Photophysical Evidence of Charge-Transfer-Complex Pairs in Mixed-Linker 5-Amino/5-Nitroisophthalate CAU-10. ChemPhysChem. 15(5):924-928. doi:10.1002/cphc.201301178
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/61333
Title:
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Photophysical Evidence of Charge-Transfer-Complex Pairs in Mixed-Linker 5-Amino/5-Nitroisophthalate CAU-10
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Author:
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Ferrer Ribera, Rosa Belén
Alvaro Rodríguez, Maria Mercedes
Baldovi, Hermengildo G.
Reinsch, Helge
Stock, Norbert
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UPV Unit:
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Universitat Politècnica de València. Departamento de Química - Departament de Química
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Issued date:
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Abstract:
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The photochemistry of two isostructural metal-organic frameworks based on 5-amino/5-formamidoisophthalate (CAU-10-NH2/NHCHO) or mixed-linker 5-amino/5-formamido- and 5-nitroisophthalate (CAU-10-NO2/NH2/NHCHO) has been ...[+]
The photochemistry of two isostructural metal-organic frameworks based on 5-amino/5-formamidoisophthalate (CAU-10-NH2/NHCHO) or mixed-linker 5-amino/5-formamido- and 5-nitroisophthalate (CAU-10-NO2/NH2/NHCHO) has been studied using laser flash photolysis. 355 nm excitation of CAU-10-NH2/NHCHO leads to a transient absorption spectrum characterized by a broad continuous absorption from 380 to 800 nm that was attributed to the presence of holes (440 nm) and electrons (600 nm) based on iPrOH and N2O quenching, respectively. In contrast, no transients were observed for the isostructural mixed-linker CAU-10-NO2/NH2/NHCHO, data that is compatible with the uniform distribution of linkers 5-amino/5-formamido/5-nitroisophthalate as charge-transfer complex pairs. The same effect of quenching of 5-aminoisophthalate transients by 5-nitroisophthalate was also observed in aqueous solution (pH 9) but with much lower strength. Using a simple Stern-Volmer formalism allowed the estimation of the interaction of 5-aminoisophthalate with 5-nitroisophthalate in MOF to be 5.2x10(4) times stronger than in the aqueous phase.
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Subjects:
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charge transfer
,
laser flash photolysis
,
metal-organic frameworks
,
photochemistry
,
photo-induced charge separation
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Copyrigths:
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Cerrado |
Source:
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ChemPhysChem. (issn:
1439-4235
) (eissn:
1439-7641
)
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DOI:
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10.1002/cphc.201301178
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Publisher:
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Wiley-VCH Verlag
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Publisher version:
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http://dx.doi.org/10.1002/cphc.201301178
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Project ID:
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Spanish Ministry of Economy and Competitiveness CTQ2010-18671 CTQ2012-32315
Generalidad Valenciana Prometeo 2012-019
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Thanks:
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Financial support by the Spanish Ministry of Economy and Competitiveness (CTQ2010-18671 and CTQ2012-32315) and Generalidad Valenciana (Prometeo 2012-019) is gratefully acknowledged.
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Type:
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Artículo
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