Effect of Ring Functionalization on the Reaction Temperature of Benzocyclobutene Thermoset Polymers
作者:Colin O. Hayes、Peng-hao Chen、R. Paxton Thedford、Christopher J. Ellison、Guangbin Dong、C. Grant Willson
DOI:10.1021/acs.macromol.6b00316
日期:2016.5.24
The temperature required to induce cross-linking in typical benzocyclobutene-based thermosets is near 250 °C, which exceeds the use temperature of many chemical components. A new and versatile synthesis of BCB-functionalized monomers has allowed access to monomers that can be incorporated into a variety of macromolecular platforms to enable significantly reduced cure temperatures. Incorporation of
Mapping Forbidden Emission to Structure in Self-Assembled Organic Nanoparticles
作者:Daniel A. Hinton、James D. Ng、Jian Sun、Stephen Lee、Semion K. Saikin、Jenna Logsdon、David S. White、Angela N. Marquard、Andrew C. Cavell、Veronica K. Krasecki、Kassandra A. Knapper、Katherine M. Lupo、Michael R. Wasielewski、Alán Aspuru-Guzik、Julie S. Biteen、Padma Gopalan、Randall H. Goldsmith
DOI:10.1021/jacs.8b09149
日期:2018.11.21
result in the blue satellite peak. The spatial heterogeneity of structure thus maps onto a gradient of photophysical behavior as seen in single-particle imaging, and the temporal evolution of structure maps onto fluctuating emissive behavior, as seen in single-particle spectroscopy. Taken together, this system provides a striking example of how physicalstructure and electronic properties are intertwined
微观形貌和电子特性之间的相互作用是有机电子材料中的一个重要主题。在这里,我们展示了具有烷基降冰片基尾部的螺芴官能化硼二吡咯甲烯 (BODIPY) 自组装成纳米粒子,与聚合物种相比,具有性质不同的特性。此外,纳米颗粒表现出许多独特的发射特性,包括光亮化、蓝色卫星峰和光谱扩散。广泛的光物理表征,包括单粒子成像和光谱学,以及时间分辨荧光,加上基于实验确定的晶体结构的电子结构计算,允许开发一种机制。具体来说,观察到 BODIPY 发色团形成准二维层,其中单位单元的堆叠会根据堆叠方向添加 J 聚合字符或 H 聚合字符。特别强的 H 耦合域显示了从上激子态发射的罕见过程,违反了 Kasha 规则,并导致蓝色卫星峰。因此,结构的空间异质性映射到单粒子成像中所见的光物理行为梯度,而结构的时间演变映射到波动的发射行为上,如单粒子光谱中所见。总之,该系统提供了一个显着的例子,说明物理结构和电子特性是如何交织在
Interfacial tetrazine click chemistry mediated assembly of multifunctional colloidosomes
作者:Meenakshi Pahwa、Priyanka Jain、Nilanjana Das Saha、Chandrabhas Narayana、Sarit S. Agasti
DOI:10.1039/d1cc03886a
日期:——
We present a facile route to synthesize gold nanoparticle-based colloidosomes via rapid and autonomous interfacial cross-linking using tetrazine click chemistry.