AI 中文总结
该研究针对超薄薄膜分子取向调控问题，以两种不同疏水烷基链数量的BODIPY衍生物为对象，结合多种表征手段和原创理论模型，实现了具有不同跃迁偶极矩取向的有序单分子层的制备，为功能薄膜设计提供了可靠策略。
AI 中文摘要
超薄薄膜内的分子取向是控制其光学和电子性质的关键因素，可用于表面光子学和光电子学领域。本研究考察了两种两亲性硼二吡咯亚甲基（BODIPY）衍生物，二者的区别在于疏水烷基链的数量，通过朗缪尔-布洛杰特（Langmuir-Blodgett）沉积法研究它们的组装行为与光学响应。结合高光谱成像、光致发光辐射模式分析和入射角分辨吸收光谱，确定了分子在纳米尺度的空间分布与取向分布。我们通过实验和新构建的原创理论模型证实，取决于分子对称性，可形成具有面内或垂直跃迁偶极矩取向的有序单分子层。这些结果强调了分子工程对界面处超分子有序性和各向异性光学性质的深远影响，为设计可用于先进光学器件的、低至单分子层水平的功能薄膜提供了可靠策略。
英文摘要
Molecular orientation within ultrathin films is a critical factor in controlling their optical and electronic properties for surface-based photonics and optoelectronics. In this study, we examine two amphiphilic boron-dipyrromethene (BODIPY) derivatives, distinguished by the number of hydrophobic alkyl chains, and investigate their organization and optical response using Langmuir--Blodgett deposition. The spatial and orientational distribution of molecules at the nanoscale is determined by combining hyperspectral imaging, photoluminescence radiation pattern analysis, and incidence-angle-resolved absorption spectroscopy. We evidence, both experimentally and based on a new and original theoretical model, the formation of organized monolayers exhibiting either in-plane or perpendicular transition dipole alignment, depending on the molecular symmetry. These results underscore the deep impact of molecular engineering on supramolecular order and anisotropic optical properties at interfaces, providing a robust strategy for the design of functional thin films down to the monolayer level for advanced optical devices.
Journal refAdvanced Optical Materials, 2026
