- A convenient one-step synthesis of 2-hydroxy-1,3,5-benzenetricarbaldehyde
-
The hexamethylenetetramine/trifluoroacetic acid system was demonstrated to be capable of introducing three aldehyde groups into the phenol molecule. Facile, one-step procedures were developed for the preparation of hitherto difficult to synthesize 2-hydroxy-1,3,5-benzenetricarbaldehyde starting from either phenol or 4-hydroxybenzaldehyde. New pKa measurements showed 2-hydroxy-1,3,5-benzenetricarbaldehyde to be an acid stronger than previously reported.
- Anderson, Andrew A.,Goetzen, Thomas,Shackelford, Scott A.,Tsank, Stella
-
-
Read Online
- NIR Fluorogenic dye as a modular platform for prodrug assembly: Real-time in vivo monitoring of drug release
-
Abstract The ability to monitor drug release in vivo provides essential pharmacological information. We developed a new modular approach for the preparation of theranostic prodrugs with a turn-ON near-infrared (NIR) fluorescence mode of action. The prodru
- Redy-Keisar, Orit,Ferber, Shiran,Satchi-Fainaro, Ronit,Shabat, Doron
-
-
Read Online
- Salicylideneanilines-Based Covalent Organic Frameworks as Chemoselective Molecular Sieves
-
Porous materials such as covalent organic frameworks (COFs) are good candidates for molecular sieves due to the chemical diversity of their building blocks, which allows fine-tuning of their chemical and physical properties by design. Tailored synthesis o
- Ning, Guo-Hong,Chen, Zixuan,Gao, Qiang,Tang, Wei,Chen, Zhongxin,Liu, Cuibo,Tian, Bingbing,Li, Xing,Loh, Kian Ping
-
-
Read Online
- Construction of Pyridine-Based Chiral Ionic Covalent Organic Frameworks as a Heterogeneous Catalyst for Promoting Asymmetric Henry Reactions
-
The difficulties in the separation of products from the reaction mixture and the recovery of the organic cationic ionic liquids (OCILs) catalysts still need to be addressed. Post modification of the pyridine unit in the covalent organic framework (COF) vi
- Chen, Minghui,Zhang, Jiabin,Liu, Chenxi,Li, Hongrui,Yang, Hewei,Feng, Yaqing,Zhang, Bao
-
supporting information
p. 1748 - 1752
(2021/04/05)
-
- Metal-Free Triazine-Based 2D Covalent Organic Framework for Efficient H2 Evolution by Electrochemical Water Splitting
-
Hydrogen evolution reaction (HER) by electrochemical water splitting is one of the most active areas of energy research, yet the benchmark electrocatalysts used for this reaction are based on expensive noble metals. This is a major bottleneck for their large-scale operation. Thus, development of efficient metal-free electrocatalysts is of paramount importance for sustainable and economical production of the renewable fuel hydrogen by water splitting. Covalent organic frameworks (COFs) show much promise for this application by virtue of their architectural stability, nanoporosity, abundant active sites located periodically throughout the framework, and high electronic conductivity due to extended π-delocalization. This study concerns a new COF material, C6-TRZ-TFP, which is synthesized by solvothermal polycondensation of 2-hydroxybenzene-1,3,5-tricarbaldehyde (TFP) and 4,4′,4′′-(1,3,5-triazine-2,4,6-triyl)tris[(1,1′-biphenyl)-4-amine]. C6-TRZ-TFP displayed excellent HER activity in electrochemical water splitting, with a very low overpotential of 200 mV and specific activity of 0.2831 mA cm?2 together with high retention of catalytic activity after a long duration of electrocatalysis in 0.5 m aqueous H2SO4. Density functional theory calculations suggest that the electron-deficient carbon sites near the π electron-donating nitrogen atoms are more active towards HER than those near the electron-withdrawing nitrogen and oxygen atoms.
- Ruidas, Santu,Mohanty, Bishnupad,Bhanja, Piyali,Erakulan,Thapa, Ranjit,Das, Prasenjit,Chowdhury, Avik,Mandal, Sanjay K.,Jena, Bikash Kumar,Bhaumik, Asim
-
p. 5057 - 5064
(2021/10/20)
-
- Integrating Suitable Linkage of Covalent Organic Frameworks into Covalently Bridged Inorganic/Organic Hybrids toward Efficient Photocatalysis
-
Covalent organic frameworks (COFs) are excellent platforms with tailored functionalities in photocatalysis. There are still challenges in increasing the photochemical performance of COFs. Therefore, we designed and prepared a series of COFs for photocatalytic hydrogen generation. Varying different ratios of β-ketoenamine to imine moieties in the linkages could differ the ordered structure, visible light harvesting, and bandgap. Overall, β-ketoenamine-linked COFs exhibited much better photocatalytic activity than those COFs having both β-ketoenamine and imine moieties on account of a nonquenched excited state and more favorable HOMO level in the photoinduced oxidation reaction from the former. Specifically, after in situ growth of β-ketoenamine-linked COFs onto NH2-Ti3C2Tx MXene via covalent connection, the heterohybrid showed an obvious improvement in photocatalytic H2 evolution because of strong covalent coupling, electrical conductivity, and efficient charge transfer. This integrated linkage evolution and covalent hybridization approach advances the development of COF-based photocatalysts.
- Gu, Long,Liu, Guofeng,Liu, Jia,Qian, Cheng,Wang, Dongdong,Wang, Hou,Wu, Hongwei,Zeng, Yongfei,Zhao, Yanli,Zhou, Weiqiang
-
supporting information
p. 4862 - 4871
(2020/04/01)
-
- Photochemical Amplifier Based on Self-Immolative Dendritic Spacers
-
A self-immolative dendritic structure was synthesized. It is based on phenol derivatives with three hydroxymethyl arms at both ortho and para positions of the core unit, potentially releasing up to 27 leaving groups in a third-generation dendrimer. The tr
- Kastrati, Agonist,Bochet, Christian G.
-
p. 7776 - 7785
(2019/06/27)
-
- A multifunctional triazine-based nanoporous polymer as a versatile organocatalyst for CO2 utilization and C-C bond formation
-
A triazine-based nanoporous multifunctional polymer with a SABET of 304 m2 g-1 has shown versatile catalytic activity in the conversion of CO2 to cyclic carbonates at 4 bar with almost 100% yield and selectivity, and in the conversion of CO2 to methanol and methane electrochemically. Additionally, it also catalyzes C-C bond formation via the Knoevenagel reaction.
- Sharma, Ruchi,Bansal, Ankushi,Ramachandran,Mohanty, Paritosh
-
supporting information
p. 11607 - 11610
(2019/10/02)
-
- Long-life room-temperature phosphorescent material and preparation method and application thereof
-
The invention discloses a long-life room-temperature phosphorescent material and a preparation method and application thereof. Phenolic hydroxyl is introduced into an organic aromatic ring structure,a complex formed by phenol anions and amine cations is p
- -
-
Paragraph 0080; 0085-0087
(2019/11/20)
-
- Chiral, triformylphenol-derived salen-type [4 + 6] organic cages
-
A one-pot synthesis of chiral [4 + 6] tetrahedral cage compounds containing a salen fragment on each face is presented. The formation of the [4 + 6] products remains in contrast to the reaction of 1,3,5-triformylphloroglucinol with chiral diamines where [
- Petryk,Szymkowiak,Gierczyk,Spólnik,Popenda,Janiak,Kwit
-
supporting information
p. 7495 - 7499
(2016/08/16)
-
- A simple but highly efficient multi-formyl phenol-amine system for fluorescence detection of peroxide explosive vapour
-
A simple, highly stable, sensitive and selective fluorescent system for peroxide explosives was developed via an aromatic aldehyde oxidation reaction. The high efficiency arises from its higher HOMO level and multiple H-bonding. The sensitivity is obtaine
- Xu, Wei,Fu, Yanyan,Gao, Yixun,Yao, Junjun,Fan, Tianchi,Zhu, Defeng,He, Qingguo,Cao, Huimin,Cheng, Jiangong
-
supporting information
p. 10868 - 10870
(2015/06/30)
-