Tsukamoto, Takamasa; Imaoka, Takane; Yamamoto, Kimihisa published an article in 2021. The article was titled 《Unique Functions and Applications of Rigid Dendrimers Featuring Radial Aromatic Chains》, and you may find the article in Accounts of Chemical Research.Electric Literature of Br3In The information in the text is summarized as follows:
Conspectus: Dendrimers, which are highly branched polymers and regarded as huge single mols., are interesting substances from the aspect of not only polymer chem. but also mol. chem. Various applications in material science and life science have been investigated by taking advantage of the radially layered structures and intramol. nanospaces of dendrimers. Most dendrimers have flexible structures that originate from their organic chains which contain many sp3-type atoms, while relatively rigid dendrimers composed only of sp2-type atoms have rarely been reported. It has been recently clarified that such rigid dendrimers exhibit a specific aromatic property not found in other materials. Dendritic phenylazomethines (DPAs), as one of the rigid dendrimers, have only sp2-type C and N atoms and possess a radially branched π-conjugation system in their own macromol. chains. Such geometric and electronic structures heighten the electron d. at the core of the dendrimer and induce an intramol. potential gradient, which affords unique reactivities that lead to extraordinary functions. This unique property of the rigid dendrimers can be regarded as a new atypical electronic state based on radial aromatic chains not found in conventional aromatic compounds containing spherical aromaticity, Mobius aromaticity, metal aromaticity, and conductive polymers. Therefore, this as-yet-unknown characteristic is expected to contribute to the further development of fundamental and materials chem. In this Account, we highlight the rigid DPA dendrimers and their peculiar atomically precise and selective assembly behaviors that originate from the radial aromatic chains. One of the most noteworthy attainments based on the radial aromatic chains is the precise synthesis of a multimetallic multinuclear complex of a dendrimer containing a total of 13 elements. Next, we describe the electrochem. and catalytic functionalization of such multinuclear dendrimer complexes and the construction of supramol. nanoarchitectures by the polymerization of DPAs. These complexes exhibit encapsulation-release switching of guests and additive-free catalytic ability similar to proteins and enzymes. Such selective and accurate control of the intramol. assembly of guests and the intermol. arrangement of hosts realized by the radial aromatic chains of dendrimers will enable supramol. chem. and biochem. to be linked from a new aspect. In addition, the multimetallic multinuclear complexes of dendrimers afford a novel approach to precisely synthesize subnanoparticles with ultrasmall particle sizes (1 nm) that have been tech. difficult to obtain by conventional nanotechnol. We discuss the method for the synthesis of these subnanoparticles with well-controlled atomicity and composition using DPA complexes as a template, and recent advances to reveal their specific phys. and chem. properties. These results suggest that the unique electronic states induced in such radial aromatics could play an important role in the development of next-generation chem. In addition to this study using Indium(III) bromide, there are many other studies that have used Indium(III) bromide(cas: 13465-09-3Electric Literature of Br3In) was used in this study.
Indium(III) bromide(cas: 13465-09-3) is used in organic synthesis as a water tolerant Lewis acid. It efficiently catalyzes the three-component coupling of β-keto esters, aldehydes and urea (or thiourea) to afford the corresponding dihydropyrimidinones.Electric Literature of Br3In
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary