Highly efficient room-temperature organic afterglow achieved by collaboration of luminescent dimeric TADF dopants and rigid matrices

2021 ◽  
Author(s):  
Bei Zhou ◽  
Guangming Wang ◽  
Xuepu Wang ◽  
Wang Guo ◽  
Junbo Li ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Room Temperature ◽  
Ambient Conditions ◽  
Highly Efficient ◽  
Greenish Yellow

Dopant–matrix systems of difluoroboron β-diketonate TADF emitters and rigid crystalline tetralone matrices display greenish yellow afterglow emission that can last for 4 s and possess an afterglow quantum yield up to 26% under ambient conditions.

Highly efficient metal(iii) porphyrin and salen complexes for the polymerization of rac-lactide under ambient conditions

2019 ◽  
Vol 48 (10) ◽  
pp. 3223-3230 ◽  
Author(s):  
Siriwan Praban ◽  
Parichat Piromjitpong ◽  
Vagulejan Balasanthiran ◽  
Savithra Jayaraj ◽  
Malcolm H. Chisholm ◽  
...  
Keyword(s):  
Room Temperature ◽  
Ambient Conditions ◽  
Highly Efficient ◽  
Salen Complexes ◽  
Salen Ligands ◽  
Lactide Polymerization

Metal(iii) complexes supported by porphyrin and salen ligands were highly efficient for rac-lactide polymerization at room temperature giving isotactic-enriched PLA.

scholarly journals Highly Efficient Heavy Atom Free Room Temperature Phosphorescence by Host-Guest Doping

2021 ◽  
Vol 9 ◽  
Author(s):  
Jinzhu Cao ◽  
Meng Zhang ◽  
Manjeet Singh ◽  
Zhongfu An ◽  
Lingfei Ji ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Room Temperature ◽  
Heavy Atom ◽  
Molar Ratio ◽  
Ambient Conditions ◽  
Room Temperature Phosphorescence ◽  
Highly Efficient ◽  
Long Lifetime ◽  
Remarkable Progress

Recently, there has been remarkable progress of the host-guest doped pure organic room-temperature phosphorescence (RTP) materials. However, it remains a great challenge to develop highly efficient host-guest doping systems. In this study, we have successfully developed a heavy atom free pure organic molecular doped system (benzophenone-thianthrene, respectively) with efficient RTP through a simple host-guest doping strategy. Furthermore, by optimizing the doping ratios, the host-guest material with a molar ratio of 100:1 presented an efficient RTP emission with 46% quantum efficiency and a long lifetime of up to 9.17 ms under ambient conditions. This work will provide an effective way to design new organic doping systems with RTP.

scholarly journals Thermochemically Stable Liquid-Crystalline Gold(I) Complexes Showing Enhanced Room Temperature Phosphorescence

Crystals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 227 ◽  
Author(s):  
Yuki Kuroda ◽  
Shin-ya Nakamura ◽  
Katam Srinivas ◽  
Arruri Sathyanarayana ◽  
Ganesan Prabusankar ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Rational Design ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
Decomposition Temperature ◽  
Ambient Conditions ◽  
Room Temperature Phosphorescence ◽  
Light Emitting ◽  
Phosphorescence Quantum Yield ◽  
Thermochemical Stability

Gold(I) complexes are some of the most attractive materials for generating aggregation-induced emission (AIE), enabling the realization of novel light-emitting applications such as chemo-sensors, bio-sensors, cell imaging, and organic light-emitting diodes (OLEDs). In this study, we propose a rational design of luminescent gold complexes to achieve both high thermochemical stability and intense room temperature phosphorescence, which are desirable features in practical luminescent applications. Here, a series of gold(I) complexes with ligands of N-heterocyclic carbene (NHC) derivatives and/or acetylide were synthesized. Detailed characterization revealed that the incorporation of NHC ligands could increase the molecular thermochemical stability, as the decomposition temperature was increased to ~300 °C. We demonstrate that incorporation of both NHC and acetylide ligands enables us to generate gold(I) complexes exhibiting both high thermochemical stability and high room-temperature phosphorescence quantum yield (>40%) under ambient conditions. Furthermore, we modified the length of alkoxy chains at ligands, and succeeded in synthesizing a liquid crystalline gold(I) complex while maintaining the relatively high thermochemical stability and quantum yield.

Pd nanoparticles anchored on amino-functionalized hierarchically porous carbon for efficient dehydrogenation of formic acid under ambient conditions

2019 ◽  
Vol 7 (45) ◽  
pp. 25791-25795 ◽  
Author(s):  
Zhenzhen Wang ◽  
Chunpeng Wang ◽  
Shanjun Mao ◽  
Yutong Gong ◽  
Yuzhuo Chen ◽  
...  
Keyword(s):  
Formic Acid ◽  
Porous Carbon ◽  
Room Temperature ◽  
Pd Nanoparticles ◽  
Ambient Conditions ◽  
Hierarchically Porous ◽  
Highly Efficient

Pd nanoparticles anchored on amino-functionalized hierarchically porous carbon are highly efficient for dehydrogenation of formic acid at room temperature.

scholarly journals Ultrafast synthesis of near-zero-cost S-doped Ni(OH)2 on C3N5 under ambient conditions with enhanced photocatalytic activity

RSC Advances ◽  
2021 ◽  
Vol 11 (57) ◽  
pp. 36166-36173
Author(s):  
Lixiao Han ◽  
Cong Peng ◽  
Jinming Huang ◽  
Shengyao Wang ◽  
Xiaohu Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Charge Transfer ◽  
Room Temperature ◽  
Transfer Efficiency ◽  
Ambient Conditions ◽  
Highly Efficient ◽  
Internal Charge Transfer ◽  
Internal Charge

2D S–Ni(OH)2 is facially planted on 2D C3N5 at room temperature in 30 minutes via a reaction between Ni(NO3)2 and Na2S in aqueous solution. Due to quick internal charge transfer efficiency, the hybrid is highly efficient for photocatalytic H2 production.

Visible-light-initiated Catalyst-free Oxidative Cleavage of Triaryl-Substituted Alkenes C=C Bonds under Ambient Conditions

2021 ◽  
Author(s):  
Wenjing Li ◽  
Shun Li ◽  
Lihua Luo ◽  
Yichen Ge ◽  
Jiaqi Xu ◽  
...  
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Ambient Air ◽  
Oxidative Cleavage ◽  
Ambient Conditions ◽  
Blue Led ◽  
Catalyst Free

The catalyst-free oxidative cleavage of (Z)-triaryl-substituted alkenes bearing pyridyl motif with ambient air under irradiation of blue LED at room temperature has been developed. The reaction was facile and scalable,...

scholarly journals Foldable and washable textile-based OLEDs with a multi-functional near-room-temperature encapsulation layer for smart e-textiles

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
So Yeong Jeong ◽  
Hye Rin Shim ◽  
Yunha Na ◽  
Ki Suk Kang ◽  
Yongmin Jeon ◽  
...  
Keyword(s):  
Room Temperature ◽  
Wearable Electronics ◽  
Ambient Conditions ◽  
Light Emitting ◽  
Stable Operating ◽  
Mechanical Durability ◽  
Potential Applications ◽  
Wearable Electronic ◽  
Data Signal ◽  
Wearable Electronic Devices

AbstractWearable electronic devices are being developed because of their wide potential applications and user convenience. Among them, wearable organic light emitting diodes (OLEDs) play an important role in visualizing the data signal processed in wearable electronics to humans. In this study, textile-based OLEDs were fabricated and their practical utility was demonstrated. The textile-based OLEDs exhibited a stable operating lifetime under ambient conditions, enough mechanical durability to endure the deformation by the movement of humans, and washability for maintaining its optoelectronic properties even in water condition such as rain, sweat, or washing. In this study, the main technology used to realize this textile-based OLED was multi-functional near-room-temperature encapsulation. The outstanding impermeability of TiO2 film deposited at near-room-temperature was demonstrated. The internal residual stress in the encapsulation layer was controlled, and the device was capped by highly cross-linked hydrophobic polymer film, providing a highly impermeable, mechanically flexible, and waterproof encapsulation.

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