Guest‐Induced Thermally Activated Delayed Fluorescence Organic Supramolcular Macrocycle Scintillators for High‐Resolution X‐Ray Imaging

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Апрель 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

Язык: Английский

---

Photofunctional cyclophane host–guest systems

Chemical Communications, Год журнала: 2025, Номер unknown

Опубликована: Янв. 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.

Язык: Английский

---

Achieving pure room temperature phosphorescence (RTP) in phenoselenazine-based organic emitters through synergism among heavy atom effect, enhanced n → π* transitions and magnified electron coupling by the A–D–A molecular configuration

Chemical Science, Год журнала: 2024, Номер 15(24), С. 9112 - 9119

Опубликована: Янв. 1, 2024

Synergism among heavy atom effect, enhanced n → π* transitions and magnified electron coupling to promote pure RTP emission.

Язык: Английский

---

Side group dependent room temperature crystallization-induced phosphorescence of benzil based all organic phosphors

RSC Advances, Год журнала: 2024, Номер 14(9), С. 6285 - 6291

Опубликована: Янв. 1, 2024

A systematic investigation on the effect of alkyl length phosphorescence performances all organic room-temperature alkoxy substituted benzil phosphors.

Язык: Английский

---

Ester-Bearing Calix[n]phenoxazines: Side Chain Enhanced Recognition and Redox-Responsive Reversible Host–Guest System

The Journal of Organic Chemistry, Год журнала: 2025, Номер 90(4), С. 1671 - 1677

Опубликована: Янв. 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.

Язык: Английский

---

Iminodibenzyl[n]arenes: prismatic structure, selective binding, and room-temperature phosphorescence prolonged by molecular rivet

Science China Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Июнь 3, 2025

Язык: Английский

---

Odd–Even Effect in Charge Transfer Complexes through the Regulation of the Alkyl Chain

ACS Materials Letters, Год журнала: 2024, Номер 6(7), С. 2748 - 2756

Опубликована: Июнь 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.

Язык: Английский

---

Strategies for Constructing Macrocyclic Arene‐Based Color‐Tunable Supramolecular Luminescent Materials

ChemPlusChem, Год журнала: 2024, Номер 89(6)

Опубликована: Янв. 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.

Язык: Английский

---

Reprogrammable Supramolecular Fluorescent Polymers for Rewritable Information Encryption and Anti‐Counterfeiting

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 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.

Язык: Английский

---

Structurally Diversified Calix[3]phenoxazines: Synthesis, Solid-State Conformational Investigation, and Host–Guest Chemistry

Organic Letters, Год журнала: 2023, Номер 25(30), С. 5597 - 5601

Опубликована: Июль 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.

Язык: Английский

---