Intermolecular London Dispersion Interactions of Azobenzene Switches for Tuning Molecular Solar Thermal Energy Storage Systems

被引：47

作者：

Kunz, Anne ^{[1
,2
]}

Heindl, Andreas H. ^{[1
,2
]}

Dreos, Ambra ^{[3
]}

Wang, Zhihang ^{[3
]}

Moth-Poulsen, Kasper ^{[3
]}

Becker, Jonathan ^{[4
]}

Wegner, Hermann A. ^{[1
,2
]}

机构：

[1] Justus Liebig Univ, Inst Organ Chem, Heinrich Buff Ring 17, D-35392 Giessen, Germany

[2] Justus Liebig Univ, Ctr Mat Res LaMa, Heinrich Buff Ring 16, D-35392 Giessen, Germany

[3] Chalmers Univ Technol, Dept Chem & Chem Engn, SE-41296 Gothenburg, Sweden

[4] Justus Liebig Univ, Inst Inorgan & Analyt Chem, Heinrich Buff Ring 17, D-35392 Giessen, Germany

来源：

CHEMPLUSCHEM | 2019年 / 84卷 / 08期

关键词：

azobenzene; London dispersions; thermal energy storage; molecular switches; noncovalent interactions; PHOTOSWITCHES; RELEASE;

D O I：

10.1002/cplu.201900330

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The performance of molecular solar thermal energy storage systems (MOST) depends amongst others on the amount of energy stored. Azobenzenes have been investigated as high-potential materials for MOST applications. In the present study it could be shown that intermolecular attractive London dispersion interactions stabilize the (E)-isomer in bisazobenzene that is linked by different alkyl bridges. Differential scanning calorimetry (DSC) measurements revealed, that this interaction leads to an increased storage energy per azo-unit of more than 3 kcal/mol compared to the parent azobenzene. The origin of this effect has been supported by computation as well as X-ray analysis. In the solid state structure attractive London dispersion interactions between the C-H of the alkyl bridge and the pi-system of the azobenzene could be clearly assigned. This concept will be highly useful in designing more effective MOST systems in the future.

引用

页码：1145 / 1148

页数：4

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