作者:Suman Kumar Maity、Ravi Kumar、Deepak K. S. Ambast、Bipul Pal、Debasish Haldar
DOI:10.1039/c2jm34338j
日期:——
The self-assembly propensities and nonlinear optical properties of synthetic dipeptides are illustrated. The single crystal X-ray diffraction study of dipeptide 1 containing a p-nitrophenylalanine moiety reveals that the peptide adopts a supramolecular antiparallel β-sheet structure using hydrogen bonding, as well as π–π stacking interactions, in the solid state and the peptide exhibits nonlocal thermal nonlinear refraction due to the thermal lensing effect. The heat dissipation in the dipeptide 1 was a slow process with a millisecond to microsecond time scale. However the peptide 2 containing a p-nitrophenylacetic acid moiety adopts a parallel β-sheet structure and has no thermal lensing effect.
图示说明了合成二肽的自组装倾向和非线性光学特性。对含有对硝基苯丙氨酸分子的二肽 1 的单晶 X 射线衍射研究表明,该二肽在固态下利用氢键以及 π-π 堆积相互作用形成了超分子反平行 β 片状结构,并且由于热透镜效应,该二肽表现出非局部热非线性折射。二肽 1 的散热是一个缓慢的过程,时间尺度在毫秒到微秒之间。然而,含有对硝基苯乙酸分子的肽 2 采用平行的 β 片状结构,没有热透镜效应。