“AB₂ + AB” Approach to Hyperbranched Polymers Used as Polymer Blue Light Emitting Materials

“AB2 + AB” Approach to Hyperbranched Polymers Used as Polymer Blue Light Emitting Material

Synthesis of Low-Generation, Aryl-/Alkyl-Type, Nonpolar Dendrons Carrying Protected Hydroxyalkyl Groups in the Periphery

An efficient convergent synthesis of first- and second-generation aryl-/alkyl-type nonpolar dendrons via Suzuki cross-coupling is described. The dendrons carry either one or two benzyl-protected hydroxyalkyl groups/terminus. Iododesilylation reactions of aryltrimethylsilanes with iodo chloride are used as a tool for the incorporation of iodo, an important functionality for transition-metal-catalyzed cross-coupling reactions. In the case of sensitive aromatics, the addition of some donor solvent like diethyl ether proved effective in suppressing side reactions through electrophilic aromatic iodination

Facile Synthesis of 3,8-Dibromo-Substituted Phenanthridine Derivatives and Their Conjugated Polymers

We present an efficient and convenient synthesis of 3,8-dibromophenanthridine derivatives and their conjugated polymers and demonstrate that phenanthridine-containing conjugated polymers can be used as luminescent chemosensor materials. High molecular weight poly(phenanthridine-co-fluorene)s (P1, P2) and poly(phenanthridine-co-p-phenylene) (P3) were synthesized by palladium-catalyzed Suzuki−Miyaura−Schlüter polycondensation (SMSPC). These phenanthridine-containing polymers are of high quantum yields in solution and show reversible optical response to protonation and deprotonation of the phenanthridine rings

Synthesis of Monodisperse Spiro-Bridged Ladder-Type Oligo-<i>p</i>-phenylenes

Monodisperse spiro-bridged ladder-type oligo-p-phenylenes, which have very rigid backbones, exhibited intensive emissions with very small Stocks shifts, displayed very good color stability upon thermo-oxidation, and were synthesized by Suzuki cross-coupling, oxidation, and BF3·ether-catalyzed cyclization reactions

Hyperbranched Polymers with a Degree of Branching of 100% Prepared by Catalyst Transfer Suzuki−Miyaura Polycondensation

Hyperbranched Polymers with a Degree of Branching of 100% Prepared by Catalyst Transfer Suzuki−Miyaura Polycondensatio

Synthesis and Properties of Hyperbranched Conjugated Porphyrins

Hyperbranched conjugated porphyrin arrays were prepared by one-pot Suzuki polycondensation of AB3 and AB3 + C4 approaches

Synthesis of Extremely Stable Blue Light Emitting Poly(spirobifluorene)s with Suzuki Polycondensation

Full spirobifluorene-based blue light emitting polymers, which exhibited extraordinary thermal and color stability, were prepared with SPC through an AB-type monomer route

Spiro-Bridged Ladder-Type Poly(<i>p</i>-phenylene)s: Towards Structurally Perfect Light-Emitting Materials

Spiro-Bridged Ladder-Type Poly(p-phenylene)s: Towards Structurally Perfect Light-Emitting Material

Porphyrins with Four Monodisperse Oligofluorene Arms as Efficient Red Light-Emitting Materials

A family of red light-emitting star-shaped porphyrins with four monodisperse conjugated oligofluorene arms was prepared by using two key reactions:  Lindsey condensation and Suzuki−Miyaura cross coupling reactions. All porphyrins exhibit high quantum yields (about 0.22) and good solubility in common organic solvents, and form high-quality solid films. Optical studies showed that the star-shaped oligomers could absorb blue light and emit saturated red light via efficient energy transfer from the fluorene segments to the porphyrin core

Synthesis of Aryl/Alkyl Building Blocks for Dendrimer and Hyperbranched Polymer Synthesis

Several useful aryl/alkyl building blocks for dendrimer and hyperbranched polymer synthesis were prepared by Suzuki−Miyaura cross-coupling reactions and iododesilylation reactions. The iododesilylations were carried out with iodine monochloride (ICl) in methylene chloride and diethyl ether (10:1). This solvent combination lowered the reagents electrophilicity to the point that the iododesilylation still proceeded absolutely cleanly, but no direct iodination of alkyl-substituted aromatics occurred, which otherwise could not be avoided