TY - JOUR
T1 - Preparation of Pyridinium Iodide-CdI2 Hybrids for Nonlinear Optical Materials
AU - Kosuge, Hiroaki
AU - Okada, Shuji
AU - Oikawa, Hidetoshi
AU - Nakanishi, Hachiro
PY - 2001/1/1
Y1 - 2001/1/1
N2 - In order to obtain a new type of organic-inorganic hybrid material for nonlinear optics, two pyridinium-CdI2 crystals, i.e., bis(4-cyano-1-methylpyridinium) tetraiodocadmate (CNP/CdI4) and bis(4-dimethylamino-1-methylpyridinium) tetraiodocadmeate (DAP/CdI4) were prepared. From X-ray crystal structure analyses, the inorganic parts of both of the crystals are found to be the tetrahedral [CdI4]2- structure. Although the CNP/CdI4 crystals have a centrosymmetric layered structure, the DAP/ CdI4 crystals do not have layered structures resulting in non-centrosymmetric space group Cc and second-order nonlinear optical activity. Thus, the second-harmonic generation (SHG) coefficients (d) of the DAP/CdI4 crystal were estimated using the oriented gas model. In spite of the shorter cutoff wavelength of DAP/CdI4 compared with that of the well-known 2-methyl-4-nitroaniline (MNA) crystal, the maximum d value was expected to reach one-third of that of the MNA in the diagonal component.
AB - In order to obtain a new type of organic-inorganic hybrid material for nonlinear optics, two pyridinium-CdI2 crystals, i.e., bis(4-cyano-1-methylpyridinium) tetraiodocadmate (CNP/CdI4) and bis(4-dimethylamino-1-methylpyridinium) tetraiodocadmeate (DAP/CdI4) were prepared. From X-ray crystal structure analyses, the inorganic parts of both of the crystals are found to be the tetrahedral [CdI4]2- structure. Although the CNP/CdI4 crystals have a centrosymmetric layered structure, the DAP/ CdI4 crystals do not have layered structures resulting in non-centrosymmetric space group Cc and second-order nonlinear optical activity. Thus, the second-harmonic generation (SHG) coefficients (d) of the DAP/CdI4 crystal were estimated using the oriented gas model. In spite of the shorter cutoff wavelength of DAP/CdI4 compared with that of the well-known 2-methyl-4-nitroaniline (MNA) crystal, the maximum d value was expected to reach one-third of that of the MNA in the diagonal component.
KW - Nonlinear optical material
KW - Organic-inorganic hybrid crystal
KW - Second-harmonic generation
KW - Structure analysis
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U2 - 10.1080/10610270108034896
DO - 10.1080/10610270108034896
M3 - Article
AN - SCOPUS:0035564182
VL - 13
SP - 233
EP - 245
JO - Supramolecular Chemistry
JF - Supramolecular Chemistry
SN - 1061-0278
IS - 1
ER -