Nonconventional Fluorescence-Based Circularly Polarized Luminescent Core/Shell Particles: Maleic Anhydride Copolymer as the Core and Chiral Helical Polyacetylene as the Shell DOI
Yanze Liu, Shenghua Yang, Biao Zhao

et al.

ACS Macro Letters, Journal Year: 2023, Volume and Issue: 12(4), P. 530 - 535

Published: April 6, 2023

Chiroptical micro/nanomaterials with circularly polarized luminescence (CPL) properties have aroused ever-increasing attention. However, the variety of such materials is seriously limited in self-assembly systems from small organic molecules. Herein, we report an unprecedented, facile strategy to achieve monodispersed polymer-based CPL-active core/shell particles using maleic anhydride copolymer as core and chiral helical polyacetylene shell. Noticeably, obtained carry no conventional fluorescent units, but can show intense blue-emitting nonconventional fluorescence both aggregation-induced emission concentration-enhanced performance. In particular, it interesting that excitation-dependent CPL behavior further observed particles, highest dissymmetry factor 5 × 10-3. The present work provides a versatile platform wide universality for constructing polymeric nano/microarchitectures.

Language: Английский

Luminescent Complexes of Platinum, Iridium, and Coinage Metals Containing N-Heterocyclic Carbene Ligands: Design, Structural Diversity, and Photophysical Properties DOI
Hani Amouri

Chemical Reviews, Journal Year: 2022, Volume and Issue: 123(1), P. 230 - 270

Published: Oct. 31, 2022

The employment of N-heterocyclic carbenes (NHCs) to design luminescent metal compounds has been the focus recent intense investigations because strong σ-donor properties, which bring stability whole system and tend push d–d dark states so high in energy that they are rendered thermally inaccessible, thereby generating highly emissive complexes for useful applications such as organic light-emitting diodes (OLEDs), or featuring chiroptical a field is still its infancy. Among NHC complexes, those containing chromophores naphthalimide, pyrene, carbazole exhibit rich emission behavior thus have attracted extensive interest past five years, especially carbene coinage with carbazolate ligands. In this review, strategies NHC-based platinum iridium large spin–orbit-coupling (SOC) described first. Subsequent paragraphs illustrate advances nucleophilic- electrophilic-based based on silver, gold, copper ability display excited state emissions particular via activated delayed fluorescence (TADF). luminescence mechanism dynamics also described. We then summarize advance NHC–metal aforementioned fields years. Finally, we propose development trend fast-growing complexes.

Language: Английский

Citations

113
Circularly polarized luminescence of coordination aggregates DOI Creative Commons
Zhong‐Liang Gong,

Zhong‐Qiu Li,

Yu‐Wu Zhong

et al.

Aggregate, Journal Year: 2022, Volume and Issue: 3(5)

Published: Feb. 11, 2022

Abstract The development and applications of materials with efficient circularly polarized luminescence (CPL) have become an interdisciplinary frontier research topic. We summarize herein the recent advance in CPL‐active aggregates based on metal‐ligand coordination (termed as “coordination aggregates”). surveyed are classified small‐molecular metal complexes, which include monocomponent assemblies Pt(II) complexes other binary helicates, polymers, frameworks. efforts improving dissymmetry factors quantum yields these use aggregation strategy enhancing performance isolated molecules discussed. chiral organic light‐emitting diodes (OLEDs) solution‐ or evaporation‐processed procedures surveyed. In addition, uses lanthanide CPL‐contrast imaging CPL probes highlighted. common discussion mechanism aggregation‐enhanced CPLs a perspective future works finally given.

Language: Английский

Citations

75
Switchable circularly polarized Room-Temperature phosphorescence based on pure organic amorphous binaphthyl polymer DOI
Ruihong Liu, Bingbing Ding,

Dongzhi Liu

et al.

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 421, P. 129732 - 129732

Published: April 20, 2021

Language: Английский

Citations

93
Optical Activity of Chiral Metal Nanoclusters DOI Open Access
Yanfei Zhu, Jun Guo, Xueying Qiu

et al.

Accounts of Materials Research, Journal Year: 2020, Volume and Issue: 2(1), P. 21 - 35

Published: Dec. 3, 2020

ConspectusThe emerging chirality in nanomaterials represents one of the most dynamic areas modern science. Although many novel chiral have been reported, origin their and related optical activity not unveiled unambiguously. Thanks to fast development noble metal cluster chemistry, structures nanoclusters (CNCs) precisely determined has decoded as four different levels including ligand, helix staple motif, asymmetry kernel, arrangement organic ligands. Generally, strong associated with electron transitions core is popularly reported among CNCs protected by ligands, following so-called "outside-in" transfer theory, namely, from ligand core. Exceptionally, inherent are discerned inside consisting achiral such staples found Au38(SR)24 Au102(SR)44 (SR = thiolate) kernel existing Au20(PP3)4Cl4 (PP3 tris(2-(diphenylphosphino)ethyl) phosphine). These nanostructures induce distinct even present reversed transformation case (i.e., structure ligand). In past decade, our group carried out extensive research work on preparation, enantioseparation, activity, application inorganic nanostructures. As representatives, enantiopure right-handed left-handed clusters intrinsic were acquired through an innovative supramolecular self-assembly method circular dichroism (CD) feature involving only was systematically studied; Au3[R/S-Tol-BINAP]3Cl (R/S-Tol-BINAP: R/S-2,2′-bis(di-p-tolylphosphino)-1,1′-binaphthyl) smallest metal-atom number designed synthesized using privileged Tol-BINAP which exhibited strongly enhanced CD signal also remarkable polarized luminescence (CPL) response self-assembled into monodispersed nanocubes.In this Account, we aim at reviewing featuring attributes activity. We will briefly introduce preparation methods CNCs, direct synthesis, exchange, enantioseparation. parts, commonly used tools for characterizing summarized, CD, vibrational (VCD), CPL, single X-ray diffraction, nuclear magnetic resonance (NMR), theoretical prediction. Then, be discussed, especially VCD, CPL along origin. Finally, future strategies fabricating possessing well potential chirality-related applications proposed. believe that Account trigger more interest study amazing but employ them fields.

Language: Английский

Citations

92
Reversible On–Off Switching of Excitation-Wavelength-Dependent Emission of a Phosphorescent Soft Salt Based on Platinum(II) Complexes DOI
Jiangang Li, Kexin Chen,

Juan Wei

et al.

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(43), P. 18317 - 18324

Published: Oct. 25, 2021

Excitation-wavelength-dependent (Ex-De) emission materials show excellent potential in diverse advanced photonic areas. Of significant importance is the on-demand regulation of Ex-De luminescence behavior these materials, which previously unprecedented. In this study, we report on a platinum(II) complex-based phosphorescent soft salt S1 ([Pt(tpp)(ed)]+[Pt(ftpp)(CN)2]- (where ttp = 2-(4-(trifluoromethyl)phenyl)pyridine, ed ethane-1,2-diamine, and ftpp 2-(4-fluoro-3-(trifluoromethyl)phenyl)pyridine)) with photoluminescence (PL) property. UV-visible absorption PL spectra were recorded DMSO-H2O mixture (1 × 10-3 M) various H2O fractions to investigate its ground excited states. Interestingly, powder that maximum peak red-shifted from 595 644 nm upon excitation at different wavelengths 360 520 nm, accompanied by an obvious color change yellow-orange red. Furthermore, confocal laser scanning fluorescence microscopy was employed determine property self-assembled uniform nanostructure, result shows absent. On basis results, conclude Pt(II)···Pt(II) distances exist are major factor responsible for properties powder. Thus, first time, reversible on-off switching achieved manipulating through mechanical stress vapor fuming. Finally, demonstrate high-level anticounterfeiting applications via multicolor displays.

Language: Английский

Citations

74
Excitation‐Dependent Multicolour Luminescence of Organic Materials: Internal Mechanism and Potential Applications DOI

Yunxia Shen,

Zhongfu An, Haichao Liu

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(6)

Published: Nov. 8, 2022

Abstract Excitation‐dependent emission (Ex‐de) materials have been of considerable academic interest and potential applications in real life. Such multicolour luminescence is a characteristic exception to the ubiquitously accepted Kasha's rule. This phenomenon has increasingly presented some studies on different systems; however, systematic overview mechanisms underlying this currently absent. Herein, we resolve issue by classifying from single chromophores dual/ternary chromophores, as well multiple emitting species. The processes are described based electronic and/or geometrical conditions under which occurs. Before present it categories, related photophysical photochemical foundations introduced. will provide clear approach designing for special applications.

Language: Английский

Citations

53
Biomolecule‐Based Circularly Polarized Luminescent Materials: Construction, Progress, and Applications DOI

Yankai Dai,

Jingqi Chen, Chuanqi Zhao

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(47)

Published: Sept. 8, 2022

Chiral materials related to circularly polarized luminescence (CPL) make up a rapidly developing new field that has broad application prospects in optoelectronic devices, selective recognition, biomedicine, and other fields. Biofunctional chiral are also attracting increasing attention because of their unique biocompatibility, coding. However, there been little discussion on biomolecule-based CPL till now. In this Review, the latest progress with biomolecules reviewed, including construction from molecular level giant microstructure, as well emerging applications. addition, we discuss challenges bio-based materials, hoping work will provide perspectives insights for more research.

Language: Английский

Citations

52
Single‐Fluorophore‐Based Organic Crystals with Distinct Conformers Enabling Wide‐Range Excitation‐Dependent Emissions DOI
Rongrong Huang, Chao Wang, Davin Tan

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(41)

Published: Aug. 18, 2022

Achieving wide-range tunable emission colors, especially in the solid state of single-fluorophore materials, remains a significant challenge. Herein, we report molecular design strategy that affords excitation-dependent emissions spanning over ≈230 nm crystalline states. Under donor-π-acceptor configuration, judiciously choose rotatable acceptor fragment, o-carborane, to enrich conformational diversities and generate conformation-dependent multicolor emissions. We further show this platform is generalizable creating materials with Based on these high-capacity information storage device finite-state machine were fabricated showcase displays storage.

Language: Английский

Citations

39
Strategies for the enhancement of CPL properties DOI
Madiha Saqlain,

Hafiz Muhammad Zohaib,

Samina Qamar

et al.

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 501, P. 215559 - 215559

Published: Nov. 24, 2023

Language: Английский

Citations

23
Self-Assembly of Peptide Hierarchical Helical Arrays with Sequence-Encoded Circularly Polarized Luminescence DOI
Qing Li, Jiaxing Zhang, Yuefei Wang

et al.

Nano Letters, Journal Year: 2021, Volume and Issue: 21(15), P. 6406 - 6415

Published: May 20, 2021

Self-assembled peptide materials with sequence-encoded properties have attracted great interest. Despite their intrinsic chirality, the generation of circularly polarized luminescence (CPL) based on self-assembly simple peptides has been rarely reported. Here, we report into hierarchical helical arrays (HHAs) controlled supramolecular handedness. The HHAs can emit full-color CPL signals after incorporation various achiral fluorescent molecules, and glum value is 40 times higher than that signal from solutions. By simply changing amino acid sequence peptides, opposite handedness be generated within HHAs. provide hydrophobic pockets to accommodate molecules arrangement through strong aromatic stacking interactions, which are responsible for signals. This work provides a pathway construct highly ordered chiral materials, broad applications in chiroptical field.

Language: Английский

Citations

49