Inorganic Chemistry
Article
Luminescent properties of compound 1 (d10 metal complex)
were examined at RT by solid-state fluorescence spectra
(Figure 6). The intense fluorescence spectrum was observed at
ACKNOWLEDGMENTS
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We thank IISER Pune and the Director Prof. K. N. Ganesh for
financial support and encouragement. S.K.G. is grateful to DAE
(Project 2011/20/37C/06/BRNS) for financial support.
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Figure 6. Emission spectra for solid-state compounds at RT. (Color
code: ligand, blue; as-synthesized compound, orange and desolvated
compound, dark yellow).
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363 and 354 nm (upon excitation at 281 nm) for compounds 1
and 1D, respectively. A luminescent spectrum of LH2 was also
recorded under the same conditions. Ligand LH2 exhibits a
fluorescent band at 402 nm (upon excitation on 291 nm). The
shift of the emission spectra from 402 to 363 nm upon
complexation is due to the deprotonation and the chelating
coordination action of the carboxylate anion. The slight shift of
the spectrum for the desolvated compound from the as-
synthesized compound may be due to the change in the
coordination environment.
In conclusion, we have designed one D-isosorbide-based
enantiopure dicarboxylic acid based ligand, and with CdII, a
luminescent homochiral porous framework has been synthe-
sized solvothermally and characterized. The framework consists
of interconnected triple-helical chains, very similar to the triple-
helical structure of a group of biologically important protein
molecules called “collagen”. Enantiopurity of the new ligand
and its cadmium(II) framework has been checked by CD
measurements. The porous framework is very stable even after
removal of the guest molecules, which shows size-selective
inclusion of H2O and MeOH over other solvents (e.g., THF,
ethanol, benzene, and cyclohexane) inside the channels.
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ASSOCIATED CONTENT
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S
* Supporting Information
HRMS, NMR, and FTIR spectra, TGA, sorption isotherms, and
X-ray crystallographic data of compound 1 in CIF format. This
material is available free of charge via the Internet at http://
AUTHOR INFORMATION
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Corresponding Author
+91-20-2590 8186.
Notes
(24) Serre, C.; Millange, F.; Thouvenot, C.; Nogues, M.; Marsolier,
The authors declare no competing financial interest.
G.; Louer, D.; Fer
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ey, G. J. Am. Chem. Soc. 2002, 124, 13519.
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dx.doi.org/10.1021/ic2025389 | Inorg. Chem. 2012, 51, 4644−4649