02111nas a2200217   4500008004100000245010300041210006900144260000800213300001600221490000800237520139200245100001201637700001201649700001701661700002101678700001101699700001801710700001901728700001701747856012901764       2017                        eng d00aSelective molecular separation by interfacially crystallized covalent organic framework thin films0 aSelective molecular separation by interfacially crystallized cov  cSEP  a13083-130910 v1393 aExponential interest in the field of covalent organic frameworks (COFs) stems from the direct correlation between their modular design principle and various interesting properties. However, existing synthetic approaches to realize this goal mainly result in insoluble and unprocessable powders, which severely restrict their widespread applicability. Therefore, developing a methodology for easy fabrication of these materials remains an alluring goal and a much desired objective. Herein, we have demonstrated a bottom-up interfacial crystallization strategy to fabricate these microcrystalline powders as large-scale thin films under ambient conditions. This unique design principle exploits liquid-liquid interface as a platform, allowing simultaneous control over crystallization and morphology of the framework structure. The thin films are grown without any support in free-standing form and can be transferred onto any desirable substrate. The porous (with Tp-Bpy showing highest SBET of 1a151 m2 g-1) and crystalline thin films, having high chemical as well as thermal stability, also hold the merit to tune the thickness as low as sub-100 nm. These nanostructured thin COF films demonstrate remarkable solvent-permeance and solute-rejection performance. A prominent instance is the Tp-Bpy thin film, which displays an unprecedented acetonitrile permeance of 339 L m-2 h-1 bar-1.1 aDey, K.1 aPal, M.1 aRout, K., C.1 aKunjattu, H., S.1 aDas, A1 aMukherjee, R.1 aKharul, U., K.1 aBanerjee, R.  uhttps://library.ncl.res.in/content/selective-molecular-separation-interfacially-crystallized-covalent-organic-framework-thin01285nas a2200157   4500008004100000245006400041210006300105260000800168300001600176490000900192520078400201100001900985700001201004700001701016856009401033       2018                        eng d00aCovalent organic frameworks: chemistry beyond the structure0 aCovalent organic frameworks chemistry beyond the structure  cNOV  a1807–18220 v141 3 aCovalent organic frameworks (COFs) represent a new field of rapidly growing chemical research that takes direct inspiration from diverse covalent bonds existing between atoms. The success of linking atoms in two and three dimensions to construct extended framework structures moved the chemistry of COFs beyond the structures to methodologies, highlighting the possibility of prospective applications. Although structure to property relation in COFs has led to fascinating properties, chemical stability, processability and scalability were some of the important challenges that needed to be overcome for their successful implementation. In this Perspective, we take a closer look at the growth of COFs from mere supramolecular structures to potential industrializable materials.1 aKandambeth, S.1 aDey, K.1 aBanerjee, R.  uhttps://library.ncl.res.in/content/covalent-organic-frameworks-chemistry-beyond-structure