TY  - JOUR
AB  - Smart light-responsive supramolecular materials have been extensively investigated in the past decade, but so far the impact of metal coordination on hierarchical supramolecular structures of lightresponsive building blocks has remained nearly unexplored. Herein, we unravel the hierarchical selfassembly of a small p-conjugated azo-containing pyridyl ligand that is able to respond to UV-light and metal complexation. The ligand self-assembles in an antiparallel fashion into long twisted fibers, which are then disassembled upon photoisomerization of the azobenzene groups, resulting in shorter rigid rods with a different packing motif. Complexation of Pd(II) ions enhances the cooperativity of the aggregation and induces a molecular rearrangement into slipped stacks with subsequent formation of long thin fibers. These are then transformed into thinner, shorter rods upon light irradiation. The observed different light-responsiveness, besides clearing up the influence of metal coordination and light irradiation in self-assembly processes, paves the way towards the design of novel supramolecular photochromic systems.
AU  - Kartha, Kalathil K.
AU  - Allampally, Naveen Kumar
AU  - Politi, Antiope T.
AU  - Prabhu, Deepak D.
AU  - Ouchi, Hayato
AU  - Albuquerque, Rodrigo Q.
AU  - Yagai, Shiki
AU  - Fernández, Gustavo
DA  - 2019
DO  - 10.1039/c8sc03875a
KW  - lichtempfindlich
KW  - Selbstorganisation
KW  - supramolekulare Polymere
KW  - p-konjugierte Systeme
KW  - metallosurpamolekular
KW  - photoresponsive
KW  - self-assembly
KW  - supramolecular polymers
KW  - p-conjugated systems
KW  - metallosurpamolecular
LA  - eng
N1  - Chemical Science (2019) 10, 752-760
N1  - This work was funded by the European Commission (ERC StG SUPRACOP 715923) and the Humboldt Foundation (Sofja-Kovalevskaja).
PY  - 2019
TI  - Influence of metal coordination and light irradiation on hierarchical self-assembly processes
TT  - Einfluss von Metallkoordination und Lichtbestrahlung auf hierarchische Selbstorganisationsprozesse
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:6-30189469112
Y2  - 2024-12-28T02:14:28
ER  -