NLO Activity in some non-conjugated 3D triazine derivatives: a non-centrosymmetric crystal through conformational flexibility
作者:K. Srinivas、Sanyasi Sitha、V. Jayathirtha Rao、K. Bhanuprakash、K. Ravikumar
DOI:10.1039/b512362c
日期:——
Four derivatives of 2,4,6-tris(benzyloxy)-1,3,5-triazine are synthesized and detailed computational and non-linear optical investigations are carried out. Computations indicate four conformations with different energies in all the systems in the gas phase; and the individual dipole moments are also of different magnitude. HRS measurements of these molecules in solution reveal moderately large β values; structure–property relations are analyzed through computations. These molecules have one added advantage of nearly 100% optical transmission through the visible range, due to the non-conjugated structure. Molecule 1 [2,4,6-tris(benzyloxy)-1,3,5-triazine] crystallizes in a non-centrosymmetric space group by adopting the conformation with the lowest dipole moment but not the lowest energy. It also shows SHG activity in the solid state.
我们合成了四种 2,4,6-三(苄氧基)-1,3,5-三嗪的衍生物,并进行了详细的计算和非线性光学研究。计算结果表明,所有体系在气相中有四种能量不同的构象;各个偶极矩的大小也各不相同。对这些分子在溶液中的 HRS 测量显示出中等大的β值;通过计算分析了结构-性质关系。这些分子的另一个优点是,由于其非共轭结构,它们在可见光范围内几乎具有 100% 的透光率。分子 1 [2,4,6-三(苄氧基)-1,3,5-三嗪] 通过采用偶极矩最低但能量并不最低的构象,在非中心对称空间群中结晶。它还在固态下显示出 SHG 活性。