Azo Polymers: Synthesis, Functions and Applications by Xiaogong Wang

By Xiaogong Wang

This e-book explores practical polymers containing fragrant azo chromophores in side-chain, main-chain and different elements in their constructions, referred to as azo polymers and which percentage universal photoresponsive houses. It makes a speciality of the molecular structure of azo polymers, the substitute tools and their most vital capabilities, comparable to photoinduced birefringence and dichroism, surface-relief-grating (SRG) formation, and light-driven deformation of liquid crystal elastomers. It combines a common survey of the topic and in-depth discussions of every subject, together with a variety of illustrations, figures, and pictures. delivering a stability among an creation to the center strategies and a image of scorching and rising issues, it truly is of curiosity to graduate scholars and researchers operating during this and similar fields.

Xiaogong Wang is a Professor on the division of Chemical Engineering, Tsinghua college, China.

Show description

Read or Download Azo Polymers: Synthesis, Functions and Applications PDF

Best fluid dynamics books

Smart Material Systems: Model Development (Frontiers in Applied Mathematics)

"The textual content can be utilized because the foundation for a graduate path in any of a number of disciplines which are fascinated by clever fabric modeling, together with physics, fabrics technology, electromechanical layout, keep an eye on platforms, and utilized arithmetic. .. [T]his well-written and rigorous textual content may be priceless for a person drawn to particular shrewdpermanent fabrics in addition to common modeling and keep an eye on of smart-material habit.

Gas adsorption equilibria : experimental methods and adsorptive isotherms

"This ebook is meant to provide for the 1st time experimental how you can degree equilibria states of natural and combined gases being adsorbed at the floor of stable fabrics. it's been written for engineers and scientists from and academia who're attracted to adsorption-based gasoline separation procedures and/or in utilizing fuel adsorption for characterization of the porosity of good fabrics.

Strömungslehre für den Maschinenbau: Technik und Beispiele

Der Band stellt als Erg? nzung zum eingef? hrten Grundlagenbuch Str? mungslehre eine tiefergehende Behandlung des Vorlesungsstoffes dar. Die Einteilung der Kapitel entspricht im wesentlichen der im Band Grundlagen: Hydrostatik, Kinematik, Impulssatz, NAVIER-STOKES-Bewegungsgleichung, Potential-, Wirbel- und Grenzschichtstr?

Asymptotic modelling of fluid flow phenomena

For the fluctuations round the skill yet quite fluctuations, and showing within the following incompressible approach of equations: on any wall; at preliminary time, and are assumed identified. This contribution arose from dialogue with J. P. Guiraud on makes an attempt to push ahead our final co-signed paper (1986) and the most notion is to place a stochastic constitution on fluctuations and to spot the big eddies with part of the chance area.

Extra resources for Azo Polymers: Synthesis, Functions and Applications

Sample text

The density functional theory (DFT) in the local-density approximation (LDA) calculation also shows that the potential energy in the vicinity of the minima is weakly dependent on the dihedral angles [18]. Most of above calculations correspond to the case of azobenzene in vacuum. Briquet et al. considered the role of solvent in MP2 and DFT calculations; it also showed that in solutions, energy difference between the planar and twisted t-AB is negligible [19]. As cis-azobenzene (c-AB) has higher energy than t-AB, it is much more difficult to obtain a pure sample for the analysis.

The ab initio calculations have been widely used to explore the photoisomerization mechanism of azobenzene and its derivatives. In a pioneering study, the photoisomerization of azobenzene under n ! π* and π ! π* excitation was investigated by ab initio calculation [43]. Some most important nuclear geometries were obtained by optimizing with the complete active space self-consistent field (CASSCF). 4 Photoisomerization Mechanism of Azobenzene 37 for n ! π* excitation, while rotation occurs after π !

In a pioneering study, the photoisomerization of azobenzene under n ! π* and π ! π* excitation was investigated by ab initio calculation [43]. Some most important nuclear geometries were obtained by optimizing with the complete active space self-consistent field (CASSCF). 4 Photoisomerization Mechanism of Azobenzene 37 for n ! π* excitation, while rotation occurs after π ! π* excitation. This result obtained from the theoretical investigation is consistent with the dual-pathway mechanism [29, 30], which was generally accepted at that time.

Download PDF sample

Rated 4.43 of 5 – based on 22 votes