Opinion: Chemical Meoscopics for the Mesoparticles Reactivity Explanation

The estimation of chemical particles reactivity and the determination of chemical reactions direction are the actual theme in new scientific trend – Chemical Mesoscopics. Paper includes the proposal about the using the theory of free energy linear dependence from physical organic chemistry and their applications for prognosis of reactions flowing. The semi-empiric constants is given according to mesoscopic physics definitions as well as the transformed Kolmogorov–Avrami equation is discussed. It is the development of Chemical Mesoscopics for organic reactivity estimation including nanostructures reactivity.

Flexible Poly(imide) Siloxane Block Copolymers to Use at Biomedical Products

The novel research on organic polymer chemistry and physical organic chemistry involve poly(imide) siloxane on advanced and emerging technologies in radiation therapy. The poly(imide siloxane) block copolymers were synthesized at different production conditions for the use of biodegradable and biocompatible materials to use at biomedical products. These block copolymers were produced by using 4,4'-oxydianiline (ODA) and 3,3,4,4-Benzophenone-tetracarboxylic dianhydride (BTDA) to form polyimide hard block. APPS and BTDA formed the polysiloxane soft block. The polysiloxane soft blocks were increased by increasing the polyimide hard blocks. Copolymers are synthesized by adjusting the soft and hard segments. Copolymers can be obtained by holding constant hard block segments and by adjusting soft block segments. Hence, flexible poly(imide siloxane) block copolymers were derived. The samples were derived in a flexible rubber form. The prepared copolymers possess the properties of elastomers. Due to these properties, these materials have potential usage in microelectronics devices and medical devices. Poly(imide) siloxane, which can be produced with the desired form and conformed at different configurations, is important in such areas. In this research, the studies on poly(imide) siloxane have supported innovative and comprehensive radiation technology in polymer industries, experimental approaches for the innovative biomedical products. The samples were characterized as flexible rubber form and this property was detected and the creep test of poly (imide) siloxane was performed by Dynamic Mechanical Analyser (DMA).

Chemistry of Bridged Lactams: Recent Developments

Bridged lactams represent the most effective and wide-ranging method of constraining the amide bond in a non-planar conformation. A previous comprehensive review on this topic was published in 2013 (Chem. Rev. 2013, 113, 5701–5765). In the present review, which is published as a part of the Special Issue on Amide Bond Activation, we present an overview of the recent developments in the field of bridged lactams that have taken place in the last five years and present a critical assessment of the current status of bridged lactams in synthetic and physical organic chemistry. This review covers the period from 2014 until the end of 2018 and is intended as an update to Chem. Rev. 2013, 113, 5701–5765. In addition to bridged lactams, the review covers recent advances in the chemistry of bridged sultams, bridged enamines and related non-planar structures.