Citation: SU Yi-Wei, LUO Kai-Jun, ZHANG Chen-Yang, GUO Qing, LIU Han-Lin, WANG Yan. Intramolecular π-π Interactions in Platinum(Ⅱ) Metalloporphyrin Dimer Homologues with Aliphatic Chains of Different Lengths[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(12): 2695-2703. doi: 10.3969/j.issn.1001-4861.2013.00.386 shu

Intramolecular π-π Interactions in Platinum(Ⅱ) Metalloporphyrin Dimer Homologues with Aliphatic Chains of Different Lengths

1.
College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, China

Received Date: 11 April 2013
Available Online: 18 July 2013
Fund Project: 国家自然科学基金(No.21072141，21172161)资助项目。 (No.21072141，21172161)

The synthesis and thermal stabilities, spectroscopic and electrochemical properties for a series of platinum(Ⅱ) metalloporphyrin dimer complexes with aliphatic chain of different lengths [-O(CH₂)_nO-] have been studied. Although dimeric porphyrin ligands and platinum(Ⅱ) complexes display nearly the same absorption spectra in the concentration range from 10^-7 to 10^-4 mol·dm^-3, these ligands and their complexes show concentration-dependent emission when the length of aliphatic chain is beyond four carbon atoms. At elevated concentration of the ligands and complexes, the emission spectra show obvious red-shifts. For complex Pt₂C₆(OPTPP)₂ and Pt₂C₁₀(OPTPP)₂, the emission maxima at 652 nm are red-shifted to 676 and 681 nm at concentrations >10^-4 mol·dm^-3. Emission spectra of the sublimate films of complexes also display similar red-shifts: 43 nm for Pt₂C₆(OPTPP)₂ and 53 nm for Pt₂C₁₀(OPTPP)₂. The concentration-dependent emission indicates that there are intramolecular π-π interactions in porphyrin dimers and platinum(Ⅱ) metalloporphyrins.
- coordination chemistry;intramolecular interactions;luminescence;platinum(Ⅱ) metalloporphyrin dimer complexes;open and folded conformations;metal-metal interactions
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沈阳化工大学材料科学与工程学院沈阳 110142