The metal-organic frameworks (MOF) of cluster [Cu4I4(DABCO)2] (DABCO = 1,4-diazabicyclo[2.2.2]octane) have been prepared and characterized as two different crystalline forms, I and II. Form I is obtained by reaction of DABCO and CuI in aqueous solution or by solvothermal reaction, while form II is obtained by reacting DABCO and CuI in acetonitrile. Their luminescence properties in the solid state have been analyzed at room temperature and at 77 K. MOF II has bright emission with a maximum at 556 nm that shifts bathochromically at low temperature in conjunction with a marked change in the colour of the emission. The emission of MOF I has a maximum at 580 nm and a less pronounced temperature depen-dence. The peculiar luminescence properties of the two isomers have been interpreted by utilising current knowledge on the excited states properties of Cu1 cubane clusters. The two isomers exhibit a high degree of porosity and can release the disordered solvent molecules trapped in the channels, whilst preserving the crystal structure. Isomer I can be converted into II on exposure to acetonitrile or methanol vapour, whereas II reverts to I when heated in a closed pan at 250°C. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA,.

Reversible interconversion between luminescent isomeric metal-organic frameworks of [Cu4I4(DABCO)2] (DABCO = 1,4-Diazabicyclo[2.2.2]octane) / Braga, D.; Maini, L.; Mazzeo, P. P.; Ventura, B.. - In: CHEMISTRY-A EUROPEAN JOURNAL. - ISSN 0947-6539. - 16:5(2010), pp. 1553-1559. [10.1002/chem.200900743]

Reversible interconversion between luminescent isomeric metal-organic frameworks of [Cu4I4(DABCO)2] (DABCO = 1,4-Diazabicyclo[2.2.2]octane)

Mazzeo P. P.;
2010-01-01

Abstract

The metal-organic frameworks (MOF) of cluster [Cu4I4(DABCO)2] (DABCO = 1,4-diazabicyclo[2.2.2]octane) have been prepared and characterized as two different crystalline forms, I and II. Form I is obtained by reaction of DABCO and CuI in aqueous solution or by solvothermal reaction, while form II is obtained by reacting DABCO and CuI in acetonitrile. Their luminescence properties in the solid state have been analyzed at room temperature and at 77 K. MOF II has bright emission with a maximum at 556 nm that shifts bathochromically at low temperature in conjunction with a marked change in the colour of the emission. The emission of MOF I has a maximum at 580 nm and a less pronounced temperature depen-dence. The peculiar luminescence properties of the two isomers have been interpreted by utilising current knowledge on the excited states properties of Cu1 cubane clusters. The two isomers exhibit a high degree of porosity and can release the disordered solvent molecules trapped in the channels, whilst preserving the crystal structure. Isomer I can be converted into II on exposure to acetonitrile or methanol vapour, whereas II reverts to I when heated in a closed pan at 250°C. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA,.
2010
Reversible interconversion between luminescent isomeric metal-organic frameworks of [Cu4I4(DABCO)2] (DABCO = 1,4-Diazabicyclo[2.2.2]octane) / Braga, D.; Maini, L.; Mazzeo, P. P.; Ventura, B.. - In: CHEMISTRY-A EUROPEAN JOURNAL. - ISSN 0947-6539. - 16:5(2010), pp. 1553-1559. [10.1002/chem.200900743]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2940434
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 125
  • ???jsp.display-item.citation.isi??? 120
social impact