81998-05-2Relevant articles and documents
Sequence and Structure of Peptoid Oligomers Can Tune the Photoluminescence of an Embedded Ruthenium Dye
Zborovsky, Lieby,Tigger-Zaborov, Hagar,Maayan, Galia
, p. 9098 - 9107 (2019)
The understanding of structure–function relationships within synthetic biomimetic systems is a fundamental challenge in chemistry. Herein we report the direct correlation between the structure of short peptoid ligands—N-substituted glycine oligomers incorporating 2,2′-bipyridine groups—varied in their monomer sequence, and the photoluminescence of RuII centers coordinated by these ligands. Based on circular dichroism and fluorescence spectroscopy we demonstrate that while helical peptoids do not affect the fluorescence of the embedded RuII chromophore, unstructured peptoids lead to its significant decay. Transmittance electron microscopy (TEM) revealed significant differences in the arrangements of metal-bound helical versus unstructured peptoids, suggesting that only the latter can have through-space interactions with the ruthenium dye leading to its quenching. High-resolution TEM enabled the remarkable direct imaging of singular ruthenium-bound peptoids and bundles, supporting our explanation for structure-depended quenching. Moreover, this correlation allowed us to fine-tune the luminescence properties of the complexes simply by modifying the sequence of their peptoid ligands. Finally, we also describe the chiral properties of these Ru–peptoids and demonstrate that remote chiral induction from the peptoids backbone to the ruthenium center is only possible when the peptoids are both chiral and helical.
Supramolecular Control of Charge-Transfer Dynamics on Dye-sensitized Nanocrystalline TiO2 Films
Hirata, Narukuni,Lagref, Jean-Jacques,Palomares, Emilio J.,Durrant, James R.,Nazeeruddin, M. Khaja,Gratzel, Michael,Di Censo, Davide
, p. 595 - 602 (2004)
A [Ru(dcbpy)2(NCS)2 dye has been chemically modified by the addition of a secondary electron donor moiety, N,N-(di-p-anisylamino)phenoxymethyl. Optical excitation of the modified dye adsorbed to nanocrystalline TiO2 films
Mechanochemical Release of Non-Covalently Bound Guests from a Polymer-Decorated Supramolecular Cage
G?stl, Robert,Küng, Robin,Pausch, Tobias,Rasch, Dustin,Schmidt, Bernd M.
supporting information, p. 13626 - 13630 (2021/05/10)
Supramolecular coordination cages show a wide range of useful properties including, but not limited to, complex molecular machine-like operations, confined space catalysis, and rich host–guest chemistries. Here we report the uptake and release of non-covalently encapsulated, pharmaceutically-active cargo from an octahedral Pd cage bearing polymer chains on each vertex. Six poly(ethylene glycol)-decorated bipyridine ligands are used to assemble an octahedral PdII6(TPT)4 cage. The supramolecular container encapsulates progesterone and ibuprofen within its hydrophobic nanocavity and is activated by shear force produced by ultrasonication in aqueous solution entailing complete cargo release upon rupture, as shown by NMR and GPC analyses.
Optically Reconfigurable Monolayer of Azobenzene Donor Molecules on Oxide Surfaces
McElhinny, Kyle M.,Huang, Peishen,Joo, Yongho,Kanimozhi, Catherine,Lakkham, Arunee,Sakurai, Kenji,Evans, Paul G.,Gopalan, Padma
, p. 2157 - 2168 (2017/03/16)
The structural configuration of molecules assembled at organic-inorganic interfaces within electronic materials strongly influences the functional electronic and vibrational properties relevant to applications ranging from energy storage to photovoltaics.
