Justin L. Mynar

Long-Term Thermal Stability of High-Efficiency Polymer Solar Cells Based on Photocrosslinkable Donor-Acceptor Conjugated Polymers

Solution-processable polymer-based organic photovoltaics (OPVs) have attracted considerable attention over the past two decades because of the many advantages they can provide: lowcost fabrication, fl exible devices, and light-weight construction. [ 1 ] In the most successful OPV device architectures, the photoactive layer is composed of a blend of a p-type conjugated polymer and an n-type fullerene derivative, forming the socalled donor–acceptor bulk heterojunction (BHJ). [ 2 ]

Acid-Degradable Cationic Dextran Particles for the Delivery of siRNA Therapeutics

We report a new acid-sensitive, biocompatible, and biodegradable microparticulate delivery system, spermine modified acetalated-dextran (Spermine-Ac-DEX), which can be used to efficiently encapsulate siRNA. These particles demonstrated efficient gene knockdown in HeLa-luc cells with minimal toxicity. This knockdown was comparable to that obtained using Lipofectamine, a commercially available transfection reagent generally limited to in vitro use due to its high toxicity.

Two-photon degradable supramolecular assemblies of linear-dendritic copolymers

Micelles of dendritic-linear copolymers have been developed to release a payload after infrared stimulus.

Radially Diblock Nanotube: Site-Selective Functionalization of a Tubularly Assembled Hexabenzocoronene

An amphiphilic Gemini-shaped hexa-peri-hexabenzocoronene (1) with azide functionalities self-assembles to form graphitic nanotubes whose interior and exterior surfaces can be post-functionalized by “click chemistry”. A click reaction of the nanotubes with bulky macromolecules such as a dendronized alkyne (G2-alkyne) takes place site-selectively on the exterior surface of the nanotubes, leaving the azide functionalities on the interior surface mostly intact. A subsequent click reaction of the resulting nanotubes with alkynes having a much smaller steric bulk allows the remaining azide groups to be functionalized, affording radially diblock graphitic nanotubes.

Doubly-dendronized linear polymers

Doubly-dendronized polymers were synthesized by grafting polybenzyl ether dendrons onto a poly(hydroxy) styrene polymer with polyaliphatic esters.