Incorporating hybrid charge transfer within a boron/nitrogen/oxygen-embedded scaffold for efficient yellow electroluminescence.

A yellow thermally activated delayed fluorescence emitter featuring a distorted boron/nitrogen/oxygen-embedded polycyclic aromatic hydrocarbon is presented. It exhibits hybrid long- and short-range charge transfer character within a rigid framework for narrowed emission bandwidth and mitigating aggregation-caused quenching, enabling an electroluminescent device with an external quantum efficiency of 20.4%.

Design and synthesis of a carbonyl-nitrogen multi-resonance thermally activated delayed fluorophore with enhanced charge transfer for electroluminescence application.

By employing an "intramolecular lock" strategy, a novel multi-resonance thermally activated delayed fluorescence (MR-TADF) emitter, QAO-PhIDA, has been designed through modulating the excited-state properties of the QAO acceptor using a steric hindrance donor PhIDA. The appropriate electron donor facilitates effective intramolecular charge transfer (ICT), while retaining the MR-TADF characteristics. Additionally, the presence of the bulky donor effectively suppresses the aggregation-caused quenching (ACQ) behavior caused by long-range π-π stacking of the QAO chromophore, which is beneficial for achieving efficient luminescence under solid-state conditions.

Multi-resonance thermally activated delayed fluorescence emitters based on BNCz framework.

Multi-resonance thermally activated delayed fluorescence (MR-TADF) materials, distinguished by their narrow emission bands and 100% exciton utilization efficiency, represent ideal candidates for high-definition organic light-emitting diode (OLED) displays. In recent years, a variety of MR-TADF emitters based on boron and nitrogen atoms have been developed, exhibiting high external quantum efficiencies and exceptionally narrow electroluminescence spectra. Among these, BNCz stands out due to its straightforward synthesis and excellent structural modifiability.

Effect of technology-aided training on physiological and psychological sports performance: Moderation analysis of sport involvement.

This study investigates the impact of technology-assisted sports training on the physiological and psychological performance of recreational exercisers (non-athletes), with particular attention to the moderating role of sport involvement (SI). A quasi-experimental design was employed, with 48 participants randomly assigned to either an experimental group (technology-assisted training) or a control group (traditional coaching) for an eight-week training program. Performance measures included exercise self-efficacy (ESE) and squat speed (SS).

Competitive Spatial Donor/Acceptor Interaction toward Efficient Blue Thermally Activated Delayed Fluorescence.

Through-space charge-transfer (TSCT) thermally activated delayed fluorescence (TADF) emitters show great promise for blue organic light-emitting diodes (OLEDs) but face challenges such as low efficiency and limited color purity. In this study, we designed and synthesized three asymmetric TSCT-TADF materials─CzTPT-PA, CzTPT-CIA, and CzTPT-IA─based on a dual donor/acceptor (D/A/D) architecture. The molecular design strategically leverages dominant donor-acceptor interactions and auxiliary coupling effects within a unique sandwich-like π-stacked structure, enabling precise control over excited-state properties.

Highly Efficient Circularly Polarized Luminescence Based on Center-Chiral Frustrated Lewis Pairs.

Achieving high-efficiency circularly polarized luminescence (CPL) in organic light-emitting diodes (OLEDs) presents a significant challenge, particularly for center-chiral systems, due to the inherent trade-off between high luminescence efficiency and large luminescence dissymmetry factors. In this work, we introduce a center-chiral frustrated Lewis pair (FLP) design to overcome this limitation. By integrating a stereogenic carbon center into a fluorene scaffold, we create a unique interaction between a boron-based multi-resonance (MR) thermally activated delayed fluorescence (TADF) Lewis acid and an arylamine Lewis base.

Highly Efficient Narrowband Circularly Polarized Luminescence from Discrete Supramolecular Aggregates.

Achieving narrowband emission, high efficiency, and circularly polarized luminescence (CPL) in organic light-emitting diodes (OLEDs) remains a significant challenge. In this study, a discrete supramolecular dimerization strategy is presented to overcome this limitation. By incorporating a helical arylamine with a sterically demanding configuration into a multi-resonance narrowband emitter, the formation of a unique dimeric structure in the solid state is enabled.

Comparison of implant stability and marginal bone loss between osseodensification and conventional osteotomy at adjacent implant sites.

Background/purpose: Osseodensification (OD) has been proposed to enhance implant stability, but the extent of stability and marginal bone changes is unclear. The aim of this study was to compare implant stability and marginal bone changes between osseodensification and conventional drilling (CD) osteotomy at adjacent implant sites.

Materials And Methods: Forty partially edentulous patients requiring two adjacent implants (n = 80) were enrolled in this study.

Pathological primary tumor status, rather than adjuvant therapy, predicts survival outcomes in pT1-3N1M0 oral cavity squamous cell carcinoma: A nationwide cohort study.

Background: Theeighth edition oftheAmerican Joint Committee onCancer (AJCC) Staging Manualclassifies pT1-3N1M0 oralcavity squamous cellcarcinoma (OCSCC) asp-Stage III. However, the prognosis within this group is heterogeneous, and the clinical benefit of adjuvant therapy for patients with a single nodal metastasis remains unclear.Here, we analyzed nationwide data from Taiwan to assess survival outcomes and examine the role of adjuvant therapy in this population.

Through-Space Interactions Enable Aggregation-Induced Quenching Suppression and Spin-Flipping Enhancement of Carbonyl-Nitrogen-Based Multiple Resonance Thermally Activated Delayed Fluorescence Emitters.

Multiple resonance (MR) thermally activated delayed fluorescence (TADF) materials hold significant potential for applications in high color purity and highly efficient organic light-emitting diodes (OLEDs). However, their inherently large planar structures often result in severe aggregation-induced quenching and slow spin-flip processes, presenting significant challenges that limit their practical applications. In this study, we designed and synthesized two MR-TADF molecules, tCON-Cz and tCON-2tBuCz, by incorporating a tCON backbone with carbazole or 3,6-di--butylcarbazole at the ortho position of the phenyl ring.

Outcome of T2 Glottic Cancer Treated with Radiotherapy Alone or Concurrent Chemo-Radiotherapy.

Laryngeal cancer accounts for 10% of head and neck cancers, with glottic cancers comprising two-thirds of cases in our country [...

Is postoperative adjuvant therapy necessary for pT3N0 oral cavity squamous cell carcinoma?

Background: The current NCCN guidelines advocate for the use of adjuvant radiotherapy (RT) or chemoradiotherapy (CRT) in pT3N0 oral cavity squamous cell carcinoma (OCSCC). Here, we sought to evaluate whether postoperative RT/CRT may confer a survival advantage in pT3N0 patients who lack adverse pathological features.

Methods: A dataset of 852 pT3N0 OCSCC patients treated between 2018 and 2021 was analyzed.

Unidirectional Polyvinylidene/Copper-Impregnated Nanohydroxyapatite Composite Membrane Prepared by Electrospinning with Piezoelectricity and Biocompatibility for Potential Ligament Repair.

Ligament tears can strongly influence an individual's daily life and ability to engage in physical activities. It is essential to develop artificial scaffolds for ligament repairs in order to effectively restore damaged ligaments. In this experiment, the objective was to evaluate fibrous membranes as scaffolds for ligament repair.

Prognostic significance of diagnosis-to-surgery interval in oral cavity squamous cell carcinoma: A nationwide study.

Background: The question as to whether prolonged diagnosis-to-surgery intervals (DSIs) may compromise survival outcomes in patients with oral cavity squamous cell carcinoma (OCSCC) remains unanswered. This nationwide study was designed to address this issue.

Methods: We analyzed data from 26,214 patients with first primary OCSCC identified in the Taiwanese Cancer Registry Database between 2011 and 2021.

Effect of modified investment and casting system on the recasting properties of high-gold alloy.

Background/purpose: High gold (Au) alloys have many advantages, such as good mechanical properties and stable chemical properties for dental restoration. The purpose of this investigation was to investigate the effect of zirconia (ZrO)-magnesia (MgO)-based investment combined with an argon arc vacuum pressure (Ar-arc VP) casting process on the recasting of high Au alloys.

Materials And Methods: The recasting Au alloys were compared between the control group of conventional SiO-based investment/horizontal centrifugal (HC) casting and the experimental group of ZrO-MgO-based investment/Ar-arc VP die casting.

Wet Photolithography From Hydrogen Abstraction of a Quasi-Orthogonal Aggregation-Induced Emitter.

A new aggregation-induced emission (AIE) luminogen is obtained by dimerizing acridin-9(10H)-one (Ac), an aggregation-caused quenching (ACQ) effect monomer via an N─N bond and forming 9H,9'H-[10,10'-biacridine]-9,9'-dione (DiAc) with D symmetry. The quenching of DiAc in solution is ascribed to the enhanced basicity promoting hydrogen bonding and then a hydrogen abstraction (HA) reaction and/or an unallowed transition in frontier orbitals with the same symmetry facilitating intersystem crossing. It is found that emissive Ac is one product of the non-emissive DiAc solution in the HA reaction activated by UV irradiation.

Margin-to-depth ratio as an independent prognostic factor in resected oral cavity squamous cell carcinoma: A nationwide cohort study.

Background: The prognostic significance of margin-to-depth ratio (MDR) in oral cavity squamous cell carcinoma (OCSCC) remains unclear, particularly in comparison to traditional margin status. We aimed to examine the association between MDR and clinical outcomes in a large Taiwanese cohort.

Methods: A total of 18,324 patients with first primary OCSCC were categorized by margin status: positive (1013), <5 mm (8371), and ≥ 5 mm (8940).

Prognostic significance of adjuvant therapy and specific radiation dosages in Taiwanese patients with oral cavity cancer and extra-nodal extension: a nationwide cohort study.

Background: The evidence for adjuvant chemoradiotherapy (CRT) of oral cavity squamous cell carcinoma (OCSCC) with extra-nodal extension (ENE) in National Comprehensive Cancer Network (NCCN) guidelines is derived from patients with head and neck cancer. The guidelines further suggest a radiation dose ranging from 6000 to 6600 cGy. In this nationwide study, we sought to evaluate the prognostic significance of adjuvant therapy and the specific radiation dosage in Taiwanese patients with pure OCSCC and ENE.

Mechanical Properties, Drug Release, Biocompatibility, and Antibacterial Activities of Modified Emulsified Gelatin Microsphere Loaded with Gentamicin Composite Calcium Phosphate Bone Cement In Vitro.

Bone defects are commonly addressed with bone graft substitutes; however, surgical procedures, particularly for open and complex fractures, may pose a risk of infection. As such, a course of antibiotics combined with a drug carrier is often administered to mitigate potential exacerbations. This study involved the preparation and modification of emulsified (Em) crosslinking-gelatin (gel) microspheres (m-Em) to reduce their toxicity.

A through-space charge transfer pyrene-based fluorophore with anti-quenching behavior for deep-blue organic light-emitting devices.

A through-space charge transfer pyrene-based fluorophore has been developed for organic light-emitting devices (OLEDs). This material exhibits deep-blue fluorescence, bipolar characteristics, and anti-quenching behavior in the solid state. It proves to be an effective emitter for both doped and nondoped deep-blue OLEDs.