Pyridine-Conjugated Pillar[5]arene: From Molecular Crystals of Blue Luminescence to Red-Emissive Coordination Nanocrystals

Lou, Xin‐Yue; Yang, Ying‐Wei

doi:10.1021/jacs.1c07006

Cited by 83 publications

(55 citation statements)

References 34 publications

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“…[9][10][11] Owing to the combined effects of the spinforbidden transition of the intersystem crossing (ISC) process and the susceptibility of the triplet excitons to molecular motion and vibration, obtaining highly efficient and ultralong DOI: 10.1002/advs.202200992 RTP emission has been challenging historically. Recent years have witnessed efforts to boost ultralong RTP and stabilize the triplet excitons via molecular design and assembly methods, including crystal engineering, [12][13][14][15] H-aggregates, [16][17][18] hostguest doping, [19][20][21] constructions of the polymer matrix, [22][23][24] metal halides, [25][26][27][28] and metal-organic frameworks. [29,30] To date, most persistently luminescent materials usually produce only a single emission color, limiting opportunities to tune a wide range of colors via multi-mode stimuli.…”

Section: Introductionmentioning

confidence: 99%

Multi‐Mode and Dynamic Persistent Luminescence from Metal Cytosine Halides through Balancing Excited‐State Proton Transfer

Xiao

Fang

et al. 2022

Advanced Science

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Persistent luminescence has attracted great attention due to the unique applications in molecular imaging, photodynamic therapy, and information storage, among many others. However, tuning the dynamic persistent luminescence through molecular design and materials engineering remains a challenge. In this work, the first example of excitation-dependent persistent luminescence in a reverse mode for smart optical materials through tailoring the excited-state proton transfer process of metal cytosine halide hybrids is reported. This approach enables ultralong phosphorescence and thermally activated delayed fluorescence emission colors highly tuned by modulation of excitation wavelength, time evolution, and temperature, which realize multi-mode dynamic color adjustment from green to blue or cyan to yellow-green. At the single crystal level, the 2D excitation/space/time-resolved optical waveguides with triple color conversion have been constructed on the organic-metal halide microsheets, which represent a new strategy for multi-dimensional information encryption and optical logic gate applications.

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Section: Introductionmentioning

confidence: 99%

Multi‐Mode and Dynamic Persistent Luminescence from Metal Cytosine Halides through Balancing Excited‐State Proton Transfer

Xiao

Fang

et al. 2022

Advanced Science

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“…Compared with traditional flexible non-conjugated polymers and small conjugated molecules, conjugated polymers (CPs) containing rigid conjugated backbones have outstanding capability of light harvesting and energy transfer, favorable to the generation of luminescence, thus endowing widespread applications in electronic sensing devices, solar battery, and semiconductor materials [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. Consequently, it is essential to work out facile and powerful strategies for obtaining promoted light-emitting CPs with high efficiency [ 11 , 12 , 13 , 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

A Fluorescent Linear Conjugated Polymer Constructed from Pillararene and Anthracene

Wang

et al. 2022

Molecules

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Over the past few years, conjugated polymers (CPs) have aroused much attention owing to their rigid conjugated structures, which can perform well in light harvesting and energy transfer and offer great potential in materials chemistry. In this article, we fabricate a new luminescent linear CP p(P[5](OTf)2-co-9,10-dea) via the Sonogashira coupling of 9,10-diethynylanthracene and trifluoromethanesulfonic anhydride (OTf) modified pillar[5]arene, generating enhanced yellow-green fluorescence emission at around 552 nm. The reaction condition was screened to get a deeper understanding of this polymerization approach, resulting in an excellent yield as high as 92% ultimately. Besides the optical properties, self-assembly behaviors of the CP in low/high concentrations were studied, where interesting adjustable morphologies from tube to sheet were observed. In addition, the fluorescence performance and structural architecture can be disturbed by the host–guest reorganization between the host CP and the guest adiponitrile, suggesting great potential of this CP material in the field of sensing and detection.

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“…As a proof-of-concept study, herein, a flexible and uniform nanofilm was prepared via confined condensation of a newly synthesized acyl-hydrazine derivative of pillar[5]arene (BHCP5A) with a commercially available triformyl-benzene (TFB) at the air/DMSO interface. BHCP5A is chosen as it possesses a rigid cavity, which is expected to inhibit stacking between layers, endowing the nanofilm with rich porosity. , The prepared BHCP5A-based nanofilm was further used to immobilize a known fluorophore, the 4-azetidine-1,8-naphthalimide derivative of cholesterol (NA-Ch) . Compared with the other two specially prepared reference NA-Ch-based films, where a pillar[5]arene-free nanofilm and a glass plate were, respectively, used as substrates, the BHCP5A-based one depicted much improved photochemical stability and sensing performance to formic acid in the air.…”

Section: Introductionmentioning

confidence: 99%

Film Nanoarchitectonics of Pillar[5]arene for High-Performance Fluorescent Sensing: a Proof-of-Concept Study

Zhai

Huang

Tang

et al. 2021

ACS Appl. Mater. Interfaces

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Substrates play crucial roles for the sensing performances of fluorescent films owing to their effect on the formation of a fluorescent adlayer. However, no such film has been developed through synthesizing a substrate with a defined structure. We herein report a kind of self-standing, uniform, and thickness tunable pillar [5]arenebased nanofilms to serve as substrates for fabricating fluorescent sensing films. In comparison with a glass plate, the pillar[5]arene-based nanofilms can ensure spatial and electronic isolation of immobilized fluorophores and circumvent aggregation-caused quenching in a film state. For conceptual proof, a formic acid fluorescent sensing film was developed through simple loading of a fluorophore, a 4-azetidine-1,8naphthalimide derivative of cholesterol (NA-Ch), onto the prepared nanofilm. Sensing performance studies demonstrated that the fluorescent film showed a sensitive, fast, and highly selective response to formic acid in air with a detection limit of lower than 2.8 mg m −3 and a response time of less than 3 s. Moreover, the sensing is fully reversible and highly repeatable. Further studies showed that the film sensor can be used for fast determination of methanol acidity via vapor sampling. Clearly, innovation of substrates with defined structures can be taken as an effective and efficient way to develop new sensing films via combination with known fluorophores.

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Pyridine-Conjugated Pillar[5]arene: From Molecular Crystals of Blue Luminescence to Red-Emissive Coordination Nanocrystals

Cited by 83 publications

References 34 publications

Multi‐Mode and Dynamic Persistent Luminescence from Metal Cytosine Halides through Balancing Excited‐State Proton Transfer

Multi‐Mode and Dynamic Persistent Luminescence from Metal Cytosine Halides through Balancing Excited‐State Proton Transfer

A Fluorescent Linear Conjugated Polymer Constructed from Pillararene and Anthracene

Film Nanoarchitectonics of Pillar[5]arene for High-Performance Fluorescent Sensing: a Proof-of-Concept Study

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