A new class of neutral phosphole oxide-based cyclometalated platinum(Ⅱ)β-diketonate complexes has been demonstrated to show cooperative self-assembly in THF-water mixtures,modulated by the directional Pt…Pt interac...A new class of neutral phosphole oxide-based cyclometalated platinum(Ⅱ)β-diketonate complexes has been demonstrated to show cooperative self-assembly in THF-water mixtures,modulated by the directional Pt…Pt interactions along with π-π stacking and/or hydrophobic interactions.The phosphole oxidebased cyclometalating ligand has been found to play an important role in determining the morphologies of aggregates in THF-water mixtures.Moreover,platinum(Ⅱ)complexes serving as active materials in resistive memory devices have been found to show promising binary memory performance with a low switching threshold voltage,long retention time and high ON/OFF ratio compared to devices based on reported organometallic complexes.The rich self-assembly and resistive memory properties of the complexes presented in the current work have illustrated the versatility of the robust platinum(Ⅱ)complexes that could be utilized for the development of functional materials.展开更多
Phospholes are emerging as distinctive conjugated scaffolds for organic fluorescent materials owing to their unique structural characteristics that are different from many commonly studied heterocyclic frameworks.Rece...Phospholes are emerging as distinctive conjugated scaffolds for organic fluorescent materials owing to their unique structural characteristics that are different from many commonly studied heterocyclic frameworks.Recently,phosphole-derived skeletons have garnered significant attention as a remarkable electron-accepting moiety,which has achieved substantial advance-ments in the application of fluorescent biomaterials because of their physicochemical traits,especially in the aspects of stability and versatility.In this context,this review summarizes the progress in phosphole-based fluorescent biomaterials over the past decade(2015-2024).It begins with an overview of the currently developed phosphole-based scaffolds specifically designed for biological applications,illustrating their unique structures and favorable properties.Representative examples are then showcased to demonstrate their potential in various biological scenarios with a primary focus on bioimaging and therapy.Last,challenges and prospects in this field are presented.This review could serve as a consolidated and valuable reference for the future exploration and innovation of bioimaging and therapy platforms.展开更多
A class of benzo[b]phosphole-based alkynylgold(I)complexes has been synthesized and characterized.These complexes share a similar benzo-[b]phosphole ligand,in which the phosphole moiety is substituted with variousπ-c...A class of benzo[b]phosphole-based alkynylgold(I)complexes has been synthesized and characterized.These complexes share a similar benzo-[b]phosphole ligand,in which the phosphole moiety is substituted with variousπ-conjugated units with different donor strengths,namely phenoxazinylphenyl,tris(di-tert-butylcarbazolyl)phenyl and 2,4-dimethylphenyl moieties.These phosphole-containing gold(I)complexes are found to be strongly luminescent in toluene with tunable emission maxima and possess solvatochromic behaviors,suggesting an emission of metal-perturbed intraligand charge transfer origin.Cyclic voltammetry studies reveal that the presence of gold(I)metal center strongly perturbs the electronic properties of the phosphole moiety of the resultant complexes,which can be further finetuned by the auxiliary ligand on the gold(I)center.In the resistive memory studies,devices based on these alkynylgold(I)complexes exhibit satisfactory binary memory behaviors,demonstrating low threshold voltages in narrow distributions,high durability and low misreading rates.Such performances are believed to be originated from a field-induced charge transfer of the alkynylgold(I)complexes,in which the electron-accepting phosphole-gold(I)unit plays a crucial role in stabilizing the charge transfer state and that led to the observed resistive switching and memory behavior.展开更多
基金supported by a General Research Fund(GRF)grant from the Research Grants Council of the Hong Kong Special Administrative Region,People’s Republic of China(HKU17302723)the receipt of a postgraduate studentship and a university postgraduate fellowship from the University of Hong Kong.
文摘A new class of neutral phosphole oxide-based cyclometalated platinum(Ⅱ)β-diketonate complexes has been demonstrated to show cooperative self-assembly in THF-water mixtures,modulated by the directional Pt…Pt interactions along with π-π stacking and/or hydrophobic interactions.The phosphole oxidebased cyclometalating ligand has been found to play an important role in determining the morphologies of aggregates in THF-water mixtures.Moreover,platinum(Ⅱ)complexes serving as active materials in resistive memory devices have been found to show promising binary memory performance with a low switching threshold voltage,long retention time and high ON/OFF ratio compared to devices based on reported organometallic complexes.The rich self-assembly and resistive memory properties of the complexes presented in the current work have illustrated the versatility of the robust platinum(Ⅱ)complexes that could be utilized for the development of functional materials.
基金supported by the National Natural Science Foundation of China(2375066 and U23A20594)the Guangdong Basic and Applied Basic Research Foundation(2023B1515040003).
文摘Phospholes are emerging as distinctive conjugated scaffolds for organic fluorescent materials owing to their unique structural characteristics that are different from many commonly studied heterocyclic frameworks.Recently,phosphole-derived skeletons have garnered significant attention as a remarkable electron-accepting moiety,which has achieved substantial advance-ments in the application of fluorescent biomaterials because of their physicochemical traits,especially in the aspects of stability and versatility.In this context,this review summarizes the progress in phosphole-based fluorescent biomaterials over the past decade(2015-2024).It begins with an overview of the currently developed phosphole-based scaffolds specifically designed for biological applications,illustrating their unique structures and favorable properties.Representative examples are then showcased to demonstrate their potential in various biological scenarios with a primary focus on bioimaging and therapy.Last,challenges and prospects in this field are presented.This review could serve as a consolidated and valuable reference for the future exploration and innovation of bioimaging and therapy platforms.
文摘A class of benzo[b]phosphole-based alkynylgold(I)complexes has been synthesized and characterized.These complexes share a similar benzo-[b]phosphole ligand,in which the phosphole moiety is substituted with variousπ-conjugated units with different donor strengths,namely phenoxazinylphenyl,tris(di-tert-butylcarbazolyl)phenyl and 2,4-dimethylphenyl moieties.These phosphole-containing gold(I)complexes are found to be strongly luminescent in toluene with tunable emission maxima and possess solvatochromic behaviors,suggesting an emission of metal-perturbed intraligand charge transfer origin.Cyclic voltammetry studies reveal that the presence of gold(I)metal center strongly perturbs the electronic properties of the phosphole moiety of the resultant complexes,which can be further finetuned by the auxiliary ligand on the gold(I)center.In the resistive memory studies,devices based on these alkynylgold(I)complexes exhibit satisfactory binary memory behaviors,demonstrating low threshold voltages in narrow distributions,high durability and low misreading rates.Such performances are believed to be originated from a field-induced charge transfer of the alkynylgold(I)complexes,in which the electron-accepting phosphole-gold(I)unit plays a crucial role in stabilizing the charge transfer state and that led to the observed resistive switching and memory behavior.
