@article {49004,
	title = {Chemically gradient hydrogen-bonded organic framework crystal film},
	journal = {Angewandte Chemie-International Edition},
	volume = {62},
	year = {2023},
	month = {JUL },
	type = {Article},
	abstract = {<p>
	Hydrogen-bonded organic frameworks (HOFs) are ordered supramolecular solid structures, however, nothing much explored as centimetre-scale self-standing films. The fabrication of such crystals comprising self-supported films is challenging due to the limited flexibility and interaction of the crystals, and therefore studies on two-dimensional macrostructures of HOFs are limited to external supports. Herein, we introduce a novel chemical gradient strategy to fabricate a crystal-deposited HOF film on an in situ-formed covalent organic polymer film (Tam-Bdca-CGHOF). The fabricated film showed versatility in chemical bonding along its thickness from covalent to hydrogen-bonded network. The kinetic-controlled Tam-Bdca-CGHOF showed enhanced proton conductivity (8.3x10(-5) S cm(-1)) compared to its rapid kinetic analogue, Tam-Bdca-COP (2.1x10(-5) S cm(-1)), which signifies the advantage of bonding-engineering in the same system.</p>
},
	keywords = {Chemical Gradience, Crystal Films, Free-Standing Films, hydrogen-bonded organic framework, Interfacial Chemistry, proton conductivity},
	issn = {1433-7851},
	doi = {10.1002/anie.202304313},
	author = {Mohammed, Abdul Khayum and Raya, Jesus and Pandikassala, Ajmal and Addicoat, Matthew A. and Gaber, Safa and Aslam, Mohamed and Ali, Liaqat and Kurungot, Sreekumar and Shetty, Dinesh}
}
@article {48798,
	title = {Unlocking the potential of proton conductivity in guanidinium-based ionic covalent organic nanosheets (iCONs) through pore interior functionalization},
	journal = {Applied Materials Today},
	volume = {33},
	year = {2023},
	month = {AUG},
	pages = {101866},
	type = {Article},
	abstract = {<p>
	Recently, scientists have been exploring the incorporation of proton carriers such as water and phosphoric acid (PA) into the pores and channels of porous materials to enhance proton conduction performance. Ionic covalent organic nanosheets (iCONs) have been identified as promising functional materials due to their inbuilt ionic interfaces, which can facilitate strong interaction with counter ions present inside the pore structure and thus shorten ion transport pathways. However, there is a lack of research related to proton conductivity in iCONs loaded with PA. To address this, we prepared three functionalized guanidinium-based iCONs using a solvothermal condensation reaction between guanidinium amine (TG) and functionalized terephthaldehyde (Da, Dha, and Dma). PA was also incorporated into the iCON structure via ex situ loading to observe its effects on proton conduction performance. The results showed that both the iCONs and PA-iCONs were highly stable in water, organic solvents, acidic and basic media. Amongst these PA-iCONs, one with hydroxyl-functionalization (PA-DhaTG) displayed high proton conductivity at 90 degrees C and 95\% relative humidity due to a Grotthuss mechanism for protons. These functionalized guanidinium-based iCONs could prove useful for applications in energy conversion devices.</p>
},
	keywords = {chemical stability, Functionalized pore interior, Guanidinium group, ionic covalent organic nanosheets, proton conductivity},
	issn = {2352-9407},
	doi = {10.1016/j.apmt.2023.101866},
	author = {Kumar, Sushil and Hu, Jiahui and Pandikassala, Ajmal and Kurungot, Sreekumar and Addicoat, Matthew A. and Szekely, Gyorgy}
}
