分层组织的手性 CuO 纳米结构中的光学不对称性和结构复杂性：深入了解协同手性的几何和晶体学效应,Inorganic Chemistry

当前位置： X-MOL 学术 › Inorg. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

分层组织的手性 CuO 纳米结构中的光学不对称性和结构复杂性：深入了解协同手性的几何和晶体学效应
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2023-09-28 , DOI: 10.1021/acs.inorgchem.3c01861
Dipanjan Samanta ₁ , Manisha Shaw ₁ , Md Abdus Salam Shaik ₁ , Rajarshi Basu ₁ , Imran Mondal ₁ , Angana Bhattacharya ₁ , Amita Pathak ₁

Affiliation

通过回流醋酸铜、氢氧化钠和 D-酒石酸的水溶液制备的花状 CuO 纳米结构，以及在 200 ℃下煅烧获得的环形形状，实现了不同长度尺度的光学不对称性和结构复杂性。 600℃。花形态中的原子尺度手性可以被视为假定的 Boerdijk-Coexter-Bernal 样四螺旋碎片，而环形形式中的原子尺度手性可以被识别为螺旋位错驱动的螺旋性。纳米结构中的不对称性分数是根据其手性光学响应进行评估的，该响应基于整个紫外-可见光范围内圆二色性 (CD) 光谱的库恩不对称因子 ( g )。根据微观和光谱观察，这两种 CuO 纳米结构的手性起源被归因于 Cu-O-Cu 网络的螺旋排列。人们尝试根据 CD 信号的红移和增强强度以及相应的煅烧各向异性因子的增加来解释两种 CuO 纳米结构中的晶体学和几何手性。此外，通过测量相应的热力学参数，说明了环形 CuO 纳米结构与对映体色氨酸部分的不同相互作用。

"点击查看英文标题和摘要"

Optical Asymmetry and Structural Complexity in Hierarchically Organized Chiral CuO Nanostructures: Insight into the Geometric and Crystallographic Effects on Cooperative Chirality

Optical asymmetry and structural complexity across different length scales were realized in flower-shaped CuO nanostructures, prepared through refluxing an aqueous solution of copper acetate, sodium hydroxide, and D-tartaric acid, as well as in their toroid-like forms obtained on calcination at 600 °C. Atomic scale chirality in the flower morphology could be visualized as putative Boerdijk-Coexter-Bernal like tetrahelical fragments, while that in the toroid form could be identified as screw dislocation-driven helicity. The fraction of asymmetry in the nanostructures has been evaluated from their chiroptical responses based on Kuhn asymmetry factor (g) from circular dichroism (CD) spectroscopy in the entire UV–vis range. The origin of chirality in the two CuO nanostructures has been assigned to the helical arrangement of the Cu–O–Cu network in accordance with their microscopic and spectroscopic observations. Attempts have been made to interpret the crystallographic and geometric chiralities in the two CuO nanostructures based on the redshift and augmented intensity of the CD signal along with an increase in their corresponding anisotropic factor on calcination. Further, the diverse interaction of the toroid-shaped CuO nanostructures with enantiomeric tryptophan moieties has been illustrated from the measurement of their corresponding thermodynamic parameters.

更新日期：2023-09-28

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南