Shape-Persistent Dendrimers.

Dendrimers have a diverse and versatile morphology, frequently consisting of core, linking, and peripheral moieties. Dendrimers with flexible linkers, such as PAMAM, cannot retain the persistent shape of molecules, and this has been widely explored and reviewed previously; nevertheless, dendrimers with stiff linkers can preserve the persistent shape of the dendrimers, which has been reported considerably less. This review thus focuses on addressing shape-persistent dendrimers with rigid linking moieties discovered in recent years, i.

Converting non-Mesogenic to Mesogenic Stacking of Amino--Triazine-Based Dendrons with -CN Phenyl Unit by Eliminating Peripheral Dipole.

Three new amino--triazine-based dendrons, , , and , containing an aryl-CN moiety in the dendritic skeleton were prepared in 72-81% yields (: R = - N(-CH), R = -OCH, : R = R = - N(-CH), : R = - N(-CH), R = - N(-CH)). Dendrons with N(-CH) and -OCH peripheral substituents, surprisingly, did not show any mesogenic phase during the thermal process. However, non-mesogenic can be converted to mesogenic or by eliminating the peripheral dipole arising from the alkoxy substituent; dendron only comprising the same N(-CH) peripheral groups showed a ~25 °C mesogenic range on heating and ~108 °C mesogenic range on cooling.

Adsorbing Volatile Organic Chemicals by Soluble Triazine-Based Dendrimers under Ambient Conditions with the Adsorption Capacity of Pyridine up to 946.2 mg/g.

Two triazine-based dendrimers with peripheral 1,3,5-triamidobenzene (1-3-5-TAB) functionality were prepared, and their void spaces in the bulk solid were investigated. We examined dendrimers of three core lengths and determined the one with the longest core exhibits the largest void space because the peripheral amides were not imbedded in the internal space of each dendritic molecule. The new dendrimers as solids were observed to adsorb volatile organic chemicals efficiently.