A Typical Metal‐Ion‐Responsive Color‐Tunable Emitting Insulated π‐Conjugated Polymer Film

Hosomi, Takuro; Masai, Hiroshi; Fujihara, Tetsuaki; Tsuji, Yasushi; Terao, Jun

doi:10.1002/ange.201603160

Cited by 8 publications

(1 citation statement)

References 62 publications

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“…As a result, the physical properties derived from their conjugation are preserved from the effect of their π-π interaction, even in the solid state, because of the high proportion of covering structures. [37][38][39][40][41] Their advantage as highly protected structures inspired the design of a novel insulated conjugated molecule for immobilization on inorganic surfaces. The defectfree structures contribute non-aggregation structures with high density and uniform π-expanded conjugation immobilization at the hybrid interface to inhibit intermolecular charge transfer.…”

Section: Introductionmentioning

confidence: 99%

Perfect isolation of π-conjugated molecules on inorganic surfaces with [1]rotaxane structure for enhancing electrical properties

Chou

Masai

Otani

et al. 2021

Preprint

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π-Conjugated molecules have been utilized to functionalize inorganic surfaces to form organic–inorganic hybrid materials. However, the intrinsically strong π–π interaction results in undesirable aggregations on the inorganic surface, thereby disturbing the charge transfer through the organic–inorganic interface. In this study, a new strategy was developed using insulated π-conjugated molecules bearing a [1]rotaxane structure, where the π-conjugation was covered with covalently linked permethylated α-cyclodextrins. Aggregation-free immobilization was achieved on an inorganic surface by using insulated molecules to suppress intermolecular interaction. In the presence of these insulated molecules, the hybrid interface displayed excellent interfacial electrical properties. Moreover, the functionalized hybrid surface was utilized as an electrocatalyst to produce hydrogen peroxide using a Co(II)–chlorin complex, wherein the catalytic efficiency was improved dramatically by utilizing insulated molecules as bridging moieties at the interface. These results demonstrate that the insulation of π-conjugated molecules is a powerful strategy for modifying inorganic surfaces.

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Section: Introductionmentioning

confidence: 99%

Perfect isolation of π-conjugated molecules on inorganic surfaces with [1]rotaxane structure for enhancing electrical properties

Chou

Masai

Otani

et al. 2021

Preprint

Self Cite

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Self‐Assembly through Coordination and π‐Stacking: Controlled Switching of Circularly Polarized Luminescence

Niu

Jiang

et al. 2019

Angewandte Chemie

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Multiple noncovalent interactions can drive selfassembly through different pathways.H ere,b yc oordinationassisted changes in p-stacking modes between chromophores in pyrene-conjugated histidine (PyHis), aself-assembly system with reversible and inversed switching of supramolecular chirality,a sw ell as circularly polarized luminescence (CPL) is described. It was found that l-PyHis self-assembled into nanofibers showing P-chirality and right-handed CPL. Upon Zn II coordination, the nanofibers changed into nanospheres with M-chirality,a sw ell as left-handed CPL. The process is reversible and the M-chirality can change to P-chirality by removing the Zn II ions.E xperimental and theoretical models unequivocally revealed that the cooperation of metal coordination and p-stacking modes are responsible the reversible switching of supramolecular chirality.T his work not only provides insight into how multiple noncovalent interactions regulate self-assembly pathways.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.Figure 4. Proposed mechanism for supramolecular chirality inversion.a) The dihedral angle between two T-shapedP yHis planes is 838 8,the face-center distance between two parallel pyrene moieties is 5.09 . b) CH-p (T-type) interactions and hydrogen bonding in the crystal of PyHis. c,d) Possible assembly route for nanosphere formation and DFT calculated model for [Zn(PyHis) 5 ] 2+ ,the pyrene rings are replaced by benzene rings for convenientcalculation. Ha toms not involvedi n hydrogen bonding are omitted for clarity.

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Self‐Assembly through Coordination and π‐Stacking: Controlled Switching of Circularly Polarized Luminescence

et al. 2019

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Multiple noncovalent interactions can drive self‐assembly through different pathways. Here, by coordination‐assisted changes in π‐stacking modes between chromophores in pyrene‐conjugated histidine (PyHis), a self‐assembly system with reversible and inversed switching of supramolecular chirality, as well as circularly polarized luminescence (CPL) is described. It was found that l‐PyHis self‐assembled into nanofibers showing P‐chirality and right‐handed CPL. Upon ZnII coordination, the nanofibers changed into nanospheres with M‐chirality, as well as left‐handed CPL. The process is reversible and the M‐chirality can change to P‐chirality by removing the ZnII ions. Experimental and theoretical models unequivocally revealed that the cooperation of metal coordination and π‐stacking modes are responsible the reversible switching of supramolecular chirality. This work not only provides insight into how multiple noncovalent interactions regulate self‐assembly pathways.

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A Typical Metal‐Ion‐Responsive Color‐Tunable Emitting Insulated π‐Conjugated Polymer Film

Cited by 8 publications

References 62 publications

Perfect isolation of π-conjugated molecules on inorganic surfaces with [1]rotaxane structure for enhancing electrical properties

Perfect isolation of π-conjugated molecules on inorganic surfaces with [1]rotaxane structure for enhancing electrical properties

Self‐Assembly through Coordination and π‐Stacking: Controlled Switching of Circularly Polarized Luminescence

Self‐Assembly through Coordination and π‐Stacking: Controlled Switching of Circularly Polarized Luminescence

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