Linker length dependence of the chromogenic properties of polymethylene-vaulted trans-bis(2-aminotroponato)palladium(II) complexes
| Autor: | Zimeng Li, Takeshi Naota, Tatsuya Matsuoka, Masahiro Ikeshita, Soichiro Kawamorita |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010405 organic chemistry
Chromogenic Organic Chemistry chemistry.chemical_element 010402 general chemistry 01 natural sciences Length dependence 0104 chemical sciences Analytical Chemistry Inorganic Chemistry Crystallography chemistry Electron configuration Absorption (chemistry) Linker Spectroscopy Palladium |
| Zdroj: | Journal of Molecular Structure. 1165:217-222 |
| ISSN: | 0022-2860 |
| DOI: | 10.1016/j.molstruc.2018.03.076 |
| Popis: | The syntheses, structures and optical properties of polymethylene-vaulted trans-bis(2-aminotroponato)palladium(II) complexes are described. A series of Pd complexes incorporating nona-, deca-, undeca- and dodecamethylene bridges (1a: n = 9; 1b: n = 10; 1c: n = 11; 1d: n = 12) was newly prepared by reacting Pd(OAc)2 with the corresponding N,N’-[alkane-1,ω-diylbis(azanediyl)]ditropone. NMR and single-crystal X-ray diffraction analyses unequivocally established the specific structures of these complexes, including trans-coordination and three-dimensional vaulted structures. The photophysical properties of 1a–d exhibit a significant linker length dependence in 2-methyl-2,3,4,5-tetrahydrofuran, such that the absorption wavelengths in the vicinity of 420 nm are red-shifted as the linker length is decreased. This trend is the opposite to that observed in the corresponding vaulted trans-bis(salicylaldiminato)Pd(II) analogues 2a–d under similar conditions. The mechanistic rationale for the specific linker-dependence of the absorption wavelengths of 1 is discussed in comparison with that of 2, based on molecular structures and electronic configurations. |
| Databáze: | OpenAIRE |
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