The hydrogen-bonded organic frameworks (HOFs) have rarely been considered for photocatalytic application, given their weak stability and low activity. One presumably effective strategy to improve the photocatalytic performance of the HOFs is to produce a core-shell composite by fabricating a particular nanostructure using stable HOFs. To this end, the surface-functionalized metal-organic frameworks (MOFs) are used as the host matrix to support the in situ assembly and subsequent multisite growth of the stable HOFs. MOF@HOF eventually obtains core-shell hybrids, i.e., NH 2 -UiO-

It is of greater significance to develop amine-cured epoxy vitrimers than conventional epoxy-carboxylic acid vitrimers because amines are the most widely curing agents than carboxylic acids. Considering that the reaction of amines with glycidyl esters can skillfully create dynamic hydroxyl esters, so we synthesized aliphatic and aromatic glycidyl esters and then cured them by amine-curing agents containing disulfide bonds. Here, besides the generated hydroxyl esters, the dynamic disulfide bonds are also integrated into the cross-linked network to form dual dynamic vitrimers. The synthesized glycidyl esters show very high-efficiency curing reactivity due to the lower activation energy. The properties of dual dynamic vitrimers can be easily tuned via the proportion of aromatic and aliphatic glycidyl esters to realize the transition from the rubber state to glass state. Moreover, the combinations of enhancement and toughening are achieved via the addition of aromatic glycidyl esters into dual dynamic vitrimers without sacrificing the curing activity and reprocessing property. Compared with single dynamic vitrimers, the dual dynamic vitrimers exhibit excellent reprocessing performances and unique rheological characteristics due to the exchange reactions of transesterification and disulfide exchange at high temperatures, which enables them to be reprocessed at 180 °C for only 5 min.

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Conjugated polymers based on NDP were synthesized and characterized. The polymer thin film organic field effect transistor exhibited ambipolar transport properties with an electron mobility up to 0.67 cm2 V−1 s−1.