Dyes and Pigments, Journal Year: 2023, Volume and Issue: 222, P. 111868 - 111868
Published: Dec. 6, 2023
Language: Английский
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: April 21, 2024
Abstract Organic scintillators, pivotal in security and medical applications, face challenges due to limited X‐ray absorption exciton utilization. Herein, a novel class of organic scintillators is introduced, named guest‐induced thermally activated delayed fluorescence (TADF) within supramolecular macrocycles via host‐guest through‐space charge transfer (TSCT). Four co‐crystals are obtained through orthogonal crystallizations involving calix[3]acridan (C[3]A) calix[3]phenothiazine (C[3]P) as hosts, along with 1,2‐dicyanobenzene (DCB) 4‐bromo‐1,2‐benzenedicarbonitrile (BrDCB) guests. Interestingly, DCB@C[3]A BrDCB@C[3]A exhibit strong TSCT reduced single‐triplet energy gap for efficient TADF emission, which leads enhanced utilization absorption, yielding radioluminescence intensities over 29 25 times higher than C[3]A. Similarly, substituting C[3]A C[3]P, the also outperform C[3]P scintillation performance. Additionally, color can be adjusted by varying electron‐donating abilities electron‐accepting guests, offering simpler color‐tuning mechanism covalent‐bonded scintillators. Furthermore, flexible film based on exhibits promising application radiography, showcasing high spatial resolution 20 lp mm −1 @MTF = 0.77. The innovative strategy fabricating reversible non‐covalent interactions presents solution designing color‐tunable high‐performance
Language: Английский
Citations
17
Chemical Communications, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
This feature article presents cyclophane-based host–guest complexes for which electronic interactions between the host and guest molecules can modulate excited-state properties in an advanced way involving both singlet triplet excited states.
Language: Английский
Citations
2
Chemical Science, Journal Year: 2024, Volume and Issue: 15(24), P. 9112 - 9119
Published: Jan. 1, 2024
Synergism among heavy atom effect, enhanced n → π* transitions and magnified electron coupling to promote pure RTP emission.
Language: Английский
Citations
7
RSC Advances, Journal Year: 2024, Volume and Issue: 14(9), P. 6285 - 6291
Published: Jan. 1, 2024
A systematic investigation on the effect of alkyl length phosphorescence performances all organic room-temperature alkoxy substituted benzil phosphors.
Language: Английский
Citations
4
The Journal of Organic Chemistry, Journal Year: 2025, Volume and Issue: 90(4), P. 1671 - 1677
Published: Jan. 23, 2025
We report an enhanced recognition and redox-responsive reversible host-guest system based on ester-bearing calix[n]phenoxazines. The carbonyl groups, oriented toward the cavity, act as extra binding sites to enhance affinity, which is confirmed by NMR FTIR experiments single-crystal structure analysis. Due oxidizable nature of calix[n]phenoxazine, a redox-controlled response established. This research not only provides strategy affinity in calix-like macrocyclic arenes but also marks major advance development arene-based reversibly responsive system.
Language: Английский
Citations
0
ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(7), P. 2748 - 2756
Published: June 4, 2024
Charge transfer (CT) complexes formed by donor–acceptor (D-A) pairs play a critical role in organic optoelectronic devices, where the CT effect is highly correlated with molecular packing and intermolecular interaction. There are still challenges exploring mechanisms of charge noncrystal state. Most studies regulated altering π-conjugated backbone substituents, which would lead to some uncertainties packing-property relationship. Herein, we utilized triazatruxene (TAT) different alkyls as donors 1,3,5-benzenetricarbonitrile (TCNPh) derivatives acceptors. The systems complex were constructed simply grinding mixture study arrangement transfer, an obvious odd–even could be observed. Thus, our further enriched alkyl chain regulation, allowing for more profound understanding relationship among aggregation structures, interactions, characteristics complex.
Language: Английский
Citations
3
ChemPlusChem, Journal Year: 2024, Volume and Issue: 89(6)
Published: Jan. 30, 2024
Abstract Over the past decades, supramolecular luminescent materials (SLMs) have attracted considerable attention due to their dynamic noncovalent interactions, versatile functions, and intriguing applications in many research fields. From construction application, great efforts progress been made color‐tunable SLMs recent years. In order realize multicolor luminescence, various design strategies proposed. Macrocyclic chemistry, one of brightest jewels field has played a crucial role stimuli‐responsive emission‐tunable SLMs. Moreover, flexible tunable conformation multiple complexation sites macrocyclic arenes (MAs) afford new opportunity create such smart materials. Inspired by our reported work on crystalline assemblies modulated naphth[4]arene, this Concept provides summary latest developments MA‐based SLMs, accompanied strategies. The aim is provide researchers with perspective construct fascinating functions.
Language: Английский
Citations
2
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 15, 2024
Abstract The development of rewritable information encryption technology with high security is essential to meet the increasing confidentiality needs, however, it remains challenging. Hence, a strategy using self‐growth and host–guest interaction construct reprogrammable photoswitchable supramolecular fluorescent polymers (PSFP) developed, enabling encryption. In this strategy, polymerizable adamantane (AD) integrated into polymer materials by employing method create desired 3D structure on surface matrix. dyes modified β ‐cyclodextrin (CDPA CDNA) photochromic spiropyran‐linked (CDSP) are incorporated growing through interactions between AD unit ( ‐CD) moieties. Based photo‐induced fluorescence resonance energy transfer (FRET) process, PSFP can undergo reversible dual‐state switching blue/green red. Interestingly, owing dynamic features interactions, be erased rewritten easily. These outstanding performances promote apply anti‐counterfeiting labels. Overall, opens up new prospects for smart materials.
Language: Английский
Citations
2
Organic Letters, Journal Year: 2023, Volume and Issue: 25(30), P. 5597 - 5601
Published: July 21, 2023
A new type of phenoxazine-based macrocyclic arene, calix[n]phenoxazines, are reported. Structurally diversified calix[3]phenoxazines with different substitutes on nitrogen atoms and methylene bridges synthesized a yield 30%-70%. Single crystal structure density function theory calculation show possess electron-rich cavities, which can selectively encapsulate suitable electron-deficient guests through multiple noncovalent interactions.
Language: Английский
Citations
4
Chemical Science, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
Organic solid state vapochromic materials are of great significance for the development supramolecular chemistry and science. Herein, we synthesize a crown ether derivative (An34C10) containing two anthracene units construct new ether-based host-guest co-crystals. Due to presence anthracene, An34C10 not only shows good fluorescence properties but also displays mechanochromism. Single crystal structural analysis, powder X-ray diffraction differential scanning calorimetry experiments demonstrate that transformation between different stacking modes is responsible In addition, can complex with 1,2,4,5-tetracyanobenzene (TCNB) form (An34C10@TCNB) Because organic solvent fuming alters charge-transfer interactions in An34C10@TCNB, co-crystals be turned on off by 4-methylpyridine chloroform vapors, respectively, realizing selective detection opposite emission outputs. Meanwhile, stimuli-responsive An34C10@TCNB possess cycling performance. This work provides strategy construction luminescent materials.
Language: Английский
Citations
0