Self-Assembly-Driven Nanomechanics in Porous Covalent Organic Framework Thin Films

2021 ◽  
Author(s):  
Kaushik Dey ◽  
Surojit Bhunia ◽  
Himadri Sekhar Sasmal ◽  
C. Malla Reddy ◽  
Rahul Banerjee
Keyword(s):  
Thin Films ◽  
Self Assembly ◽  
Covalent Organic Framework ◽  
Organic Framework

Covalent Self-Assembly in Two Dimensions: Connecting Covalent Organic Framework Nanospheres into Crystalline and Porous Thin Films

2019 ◽  
Vol 141 (51) ◽  
pp. 20371-20379 ◽  
Author(s):  
Himadri Sekhar Sasmal ◽  
Arjun Halder ◽  
Shebeeb Kunjattu H ◽  
Kaushik Dey ◽  
Athulya Nadol ◽  
...  
Keyword(s):  
Thin Films ◽  
Self Assembly ◽  
Two Dimensions ◽  
Covalent Organic Framework ◽  
Porous Thin Films ◽  
Organic Framework

scholarly journals Heterogeneous C─H Functionalization in Water via Porous Covalent Organic Framework Nano Films: A Case of Catalytic Sphere Transmutation

2021 ◽  
Author(s):  
Rahul Banerjee ◽  
Himadri Sasmal ◽  
Saikat Bag ◽  
Bittu Chandra ◽  
Poulami Majumder ◽  
...  
Keyword(s):  
Thin Films ◽  
Heterogeneous Catalysis ◽  
Self Assembly ◽  
Reaction Medium ◽  
Practical Implementation ◽  
Organic Substrates ◽  
Covalent Organic Framework ◽  
High Valent ◽  
High Degree ◽  
Organic Framework

Abstract Heterogeneous catalysis in water has not been explored beyond certain advantages like recyclability and recovery of the catalysts from the reaction medium. In doing so, they often fail to address other authentic pitfalls of homogeneous catalysis. Moreover, poor yield, extremely low selectivity, and active catalytic sites' deactivation further underrate the heterogeneous catalysis in water. On the other hand, most of the synthetically useful homogeneous catalysts are either water intolerant or remain catalytically inactive in water. Considering these facts, we have rationally designed and synthesized solution dispersible porous covalent organic framework (COF) nano-spheres to utilize their distinctive morphology and dispersibility to bridge between homogeneous and heterogeneous catalysis. The success has further been extended in fabricating catalyst immobilized COF thin-films via covalent self-assembly for the very first time. We have used these catalyst immobilized COF thin-films to develop a general methodology for the C-H functionalization of organic substrates in water. This unique covalent self-assembly occurs through the protrusion of the fibers/threads at the interface of two nano-spheres, transmuting the catalytic spheres into films without any leaching of catalyst molecules, which was hitherto unheard of. The catalyst immobilized porous COF thin-films' chemical functionality and hydrophobic environment stabilizes the high valent transient active oxoiron(V) intermediate in water and restricts the active catalytic site's deactivation. An elevated catalytic yield and high selectivity (3°:2°) have been achieved in open-air conditions at room temperature, accompanying the elemental feature of heterogeneous catalysis, i.e., the recyclability. These COF films functionalized the unactivated C-H bonds in water with a high catalytic yield (45-99%) and with a high degree of selectivity (cis:trans=155:1; 3°:2°=257:1 in case of cis-1,2-dimethylcyclohexane). To establish the "practical implementation" of this approach, we conducted the inflow catalysis (Turnover Number = 355±5) using catalyst immobilized COF films fabricated on a macroporous polymeric support.

scholarly journals Orientation transitions during the growth of imine covalent organic framework thin films

2017 ◽  
Vol 5 (21) ◽  
pp. 5090-5095 ◽  
Author(s):  
H. Wang ◽  
B. He ◽  
F. Liu ◽  
C. Stevens ◽  
M. A. Brady ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Experimental Observation ◽  
Growth Kinetic ◽  
Film Growth ◽  
Nucleation And Growth ◽  
Thin Film Growth ◽  
Covalent Organic Framework ◽  
Kinetic Processes ◽  
Organic Framework

The first experimental observation of a rare re-entrant transition during COF thin film growth reveals independent nucleation and growth kinetic processes.

Synthesis and tailored properties of covalent organic framework thin films and heterostructures

2021 ◽  
Author(s):  
Lucas K. Beagle ◽  
Qiyi Fang ◽  
Ly D. Tran ◽  
Luke A. Baldwin ◽  
Christopher Muratore ◽  
...  
Keyword(s):  
Thin Films ◽  
Covalent Organic Framework ◽  
Organic Framework

Confined Synthesis of Two-Dimensional Covalent Organic Framework Thin Films within Superspreading Water Layer

2018 ◽  
Vol 140 (38) ◽  
pp. 12152-12158 ◽  
Author(s):  
Qing Hao ◽  
Chuangqi Zhao ◽  
Bing Sun ◽  
Cheng Lu ◽  
Jian Liu ◽  
...  
Keyword(s):  
Thin Films ◽  
Water Layer ◽  
Two Dimensional ◽  
Covalent Organic Framework ◽  
Organic Framework

scholarly journals A highly soluble, crystalline covalent organic framework compatible with device implementation

2019 ◽  
Vol 10 (4) ◽  
pp. 1023-1028 ◽  
Author(s):  
Lingling Wang ◽  
Cheng Zeng ◽  
Hong Xu ◽  
Panchao Yin ◽  
Dongcheng Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Optoelectronic Devices ◽  
The Other ◽  
Covalent Organic Framework ◽  
Organic Framework

We report a soluble yet crystalline covalent organic framework (COF) by regulation of inter-layer interactions, which endows the COF with remarkable solubility and processability of thin films for optoelectronic devices that exhibit high yet anisotropic conductivities and outperform all the other COF-based semiconductors.

scholarly journals Directional Charge-Carrier Transport in Oriented Benzodithiophene Covalent Organic Framework Thin Films

ACS Nano ◽  
2017 ◽  
Vol 11 (3) ◽  
pp. 2706-2713 ◽  
Author(s):  
Dana D. Medina ◽  
Michiel L. Petrus ◽  
Askhat N. Jumabekov ◽  
Johannes T. Margraf ◽  
Simon Weinberger ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Carrier ◽  
Carrier Transport ◽  
Charge Carrier Transport ◽  
Covalent Organic Framework ◽  
Organic Framework

scholarly journals Two‐Dimensional Boronate Ester Covalent Organic Framework Thin Films with Large Single Crystalline Domains for a Neuromorphic Memory Device

2020 ◽  
Vol 132 (21) ◽  
pp. 8295-8301 ◽  
Author(s):  
SangWook Park ◽  
Zhongquan Liao ◽  
Bergoi Ibarlucea ◽  
Haoyuan Qi ◽  
Hung‐Hsuan Lin ◽  
...  
Keyword(s):  
Thin Films ◽  
Memory Device ◽  
Two Dimensional ◽  
Single Crystalline ◽  
Boronate Ester ◽  
Covalent Organic Framework ◽  
Crystalline Domains ◽  
Organic Framework

Oriented 2D Covalent Organic Framework Thin Films on Single-Layer Graphene

Science ◽  
2011 ◽  
Vol 332 (6026) ◽  
pp. 228-231 ◽  
Author(s):  
J. W. Colson ◽  
A. R. Woll ◽  
A. Mukherjee ◽  
M. P. Levendorf ◽  
E. L. Spitler ◽  
...  
Keyword(s):  
Thin Films ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Covalent Organic Framework ◽  
Layer Graphene ◽  
Organic Framework
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