Azobenzene Functionalized “T-Type” Poly(Amide Imide)s vs. Guest-Host Systems—A Comparative Study of Structure-Property Relations

Abstract

This paper describes the synthesis and characterization of new “T-type” azo poly(amide imide)s as well as guest-host systems based on the “T-type” matrices. The matrices possessed pyridine rings in a main-chain and azobenzene moieties located either between the amide or imide groups. The non-covalent polymers contained the molecularly dispersed 4-phenylazophenol or 4-[(4-methyl phenyl)diazinyl]phenol chromophores that are capable of forming intermolecular hydrogen bonds with the pyridine rings. The FTIR spectroscopy and the measurements of the thermal, optical and photoinduced optical birefringence were employed for the determination of the influence of H-bonds and the specific elements of polymer architecture on physicochemical properties. Moreover, the obtained results were compared to those described in our previous works to formulate structure-property relations that may be considered general for the class of “T-type” azo poly(amide imide)s.

Structural Chemistry-Assisted Strategy toward Fast Cis–Trans Photo/Thermal Isomerization Switch of Novel Azo-Naphthalene-Based Polyimides

“…Meanwhile, various ABn-based diamines have been prepared and used afterward for the synthesis and characterization of azopolyimides, usually containing substituted or unsubstituted ABn side chains. In this way, a broad range of azopolyimides, azo-poly­(amide-imides), or azo-poly­(ester-imides) have been synthesized. ,,− Despite the large number of studies on azopolyimides, there is no clear understanding of the trade-off between the structure and their photoisomerization behavior, the majority of the studies providing only a general overview regarding the isomerization mechanism. This is of particular interest as the current challenge is to develop materials that can face simultaneously requirements such as high flexibility, high glass transition, and thermal stability in a defined environment along with efficient, fast, and stable optical response over time in view of future optoelectronic applications.…”

Evaluation of Local Mechanical and Chemical Properties via AFM as a Tool for Understanding the Formation Mechanism of Pulsed UV Laser-Nanoinduced Patterns on Azo-Naphthalene-Based Polyimide Films

“…Many azodiamines have been obtained and used for the synthesis and characterization of the azopolyimides, usually containing substituted or unsubstituted azobenzene side chains. Thus, a broad range of azopolyimides, azo polyamide-imides, or azo polyester-imides have been published thus far [ 12 , 15 , 17 , 18 , 19 ]. The majority of polymers functionalized with azobenzene derivatives under the action of linearly polarized light undergo multiple reversible trans to cis photo-isomerization processes.…”