Controlling on-surface polymerization by hierarchical and substrate-directed growth

A key challenge in the field of nanotechnol., in particular in the design of mol. machines, novel materials or mol. electronics, is the bottom-up construction of covalently bound mol. architectures in a well-defined arrangement. To date, only rather simple structures have been obtained because of the limitation of one-step connection processes. Indeed, for the formation of sophisticated structures, step-by-step connection of mols. is required. Here, we present a strategy for the covalent connection of mols. in a hierarchical manner by the selective and sequential activation of specific sites, thereby generating species with a programmed reactivity. This approach leads to improved network quality and enables the fabrication of heterogeneous architectures with high selectivity. Furthermore, substrate-directed growth and a preferred orientation of the mol. nanostructures are achieved on an anisotropic surface. The demonstrated control over reactivity and diffusion during covalent bond formation constitutes a promising route towards the creation of sophisticated multi-component mol. nanostructures. [on SciFinder(R)]     «

A key challenge in the field of nanotechnol., in particular in the design of mol. machines, novel materials or mol. electronics, is the bottom-up construction of covalently bound mol. architectures in a well-defined arrangement. To date, only rather simple structures have been obtained because of the limitation of one-step connection processes. Indeed, for the formation of sophisticated structures, step-by-step connection of mols. is required. Here, we present a strategy for the covalent connect...     »

CAN 156:231030 Chemistry of Synthetic High Polymers 29162-73-0 Role: PRP (Properties) (Br4TPP; controlling on-surface polymn. by hierarchical and substrate-directed growth); 607739-64-0 Role: PRP (Properties), RCT (Reactant), RACT (Reactant or reagent) (DBTF; controlling on-surface polymn. by hierarchical and substrate-directed growth); 1357156-13-8P; 1357156-14-9P; 1357156-15-0P; 1357156-16-1P; 1357156-17-2P Role: PRP (Properties), SPN (Synthetic preparation), PREP (Preparation) (controlling on-surface polymn. by hierarchical and substrate-directed growth); 159152-18-8; 401901-10-8 Role: PRP (Properties) (controlling on-surface polymn. by hierarchical and substrate-directed growth); 109-97-7 (Pyrrole); 1122-91-4 (4-Bromobenzaldehyde); 15164-44-0 (4-Iodobenzaldehyde) Role: RCT (Reactant), RACT (Reactant or reagent) (controlling on-surface polymn. by hierarchical and substrate-directed growth); 159152-11-1P (5-(4-Bromophenyl)dipyrromethane) Role: RCT (Reactant), SPN (Synthetic preparation), PREP (Preparation), RACT (Reactant or reagent) (controlling on-surface polymn. by hierarchical and substrate-directed growth); 7440-57-5 (Gold) Role: NUU (Other use, unclassified), USES (Uses) (substrate; controlling on-surface polymn. by hierarchical and substrate-directed growth); 1357156-12-7P (5,15-Bis(4'-bromophenyl)-10,20-bis(4'-iodophenyl)porphyrin) Role: PRP (Properties), RCT (Reactant), SPN (Synthetic preparation), PREP (Preparation), RACT (Reactant or reagent) (trans-Br2I2TPP; controlling on-surface polymn. by hierarchical and substrate-directed growth)     «

CAN 156:231030 Chemistry of Synthetic High Polymers 29162-73-0 Role: PRP (Properties) (Br4TPP; controlling on-surface polymn. by hierarchical and substrate-directed growth); 607739-64-0 Role: PRP (Properties), RCT (Reactant), RACT (Reactant or reagent) (DBTF; controlling on-surface polymn. by hierarchical and substrate-directed growth); 1357156-13-8P; 1357156-14-9P; 1357156-15-0P; 1357156-16-1P; 1357156-17-2P Role: PRP (Properties), SPN (Synthetic preparation), PREP (Preparation) (contro...     »