https://scholar.dgist.ac.kr/handle/20.500.11750/61 2026-08-03T12:48:44Z https://scholar.dgist.ac.kr/handle/20.500.11750/60481 Title: Hydrocarbon Frameworks with Long-Range Order Synthesized via Olefin Metathesis Author(s): Sui, Xuelin; Xiong, Chenxi; He, Jiaxing; Park, Sun Ho; Kong, Fan-cheng; Ying, Zhuoliang; Jiang, Enhui; Chow, Philip C. Y.; Zhou, Yi; Jeong, Keunhong; Terasaki, Osamu; Han, Yu; Jeong, Nak Cheon; Phillips, David Lee; Lee, Seungkyu Abstract: Introducing long-range order into hydrocarbon covalent organic frameworks (COFs) remains a fundamental challenge because carbon-carbon bond-forming reactions are typically irreversible and lack effective error-correction mechanisms. Here, we demonstrate a molecular approach to enhance the crystallinity of a hydrocarbon framework. A fully hydrocarbon two-dimensional (2D) COF, HKU-50, was synthesized via reversible olefin metathesis. Polymerization of a vinylene-bearing monomer using the second-generation Grubbs catalyst initially yielded an amorphous network. Upon addition of trans-stilbene, secondary metathesis is activated, regenerating catalysts that are otherwise trapped within the growing polymer. This enables continuous bond exchange and error correction during framework formation. As a result, the system evolves toward its thermodynamically favored product, HKU-50, with long-range order. The resulting COF exhibits high thermal and chemical stability, along with enhanced photophysical properties, including red-shifted emission, prolonged fluorescence lifetime, and a 4-fold increase in photoluminescence quantum yield relative to its amorphous analogue due to its extended order. These findings demonstrate a molecular approach that actively controls the crystallinity of hydrocarbon frameworks without the use of supports or interfaces that induce partial ordering of the building units. 2026-03-31T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/60311 Title: Dynamic coordination bonding in metal-organic frameworks: fundamental concepts and emerging applications Author(s): Park, Sun Ho; Kim, Byong June; Choi, Jaehyeuk; Kim, Inhoo; Jeong, Nak Cheon Abstract: Metal-organic frameworks (MOFs) have long been regarded as rigid crystalline solids with static coordination bonds. Mounting spectroscopic and crystallographic evidence, however, shows that these bonds are dynamic, undergoing transient dissociation and reassociation without loss of framework integrity. This recognition has catalyzed the concept of dynamic coordination bonding, offering a fresh perspective on MOF chemistry and function. In this review, we define this concept and organize it into two complementary modes: (i) metal-guest dynamics at open metal sites and (ii) metal-linker dynamics within the lattice. We combine experimental and theoretical evidence demonstrating that bond dynamics underpin key functions-including non-thermal activation, gas adsorption, heterogeneous catalysis, and the formation of liquid and glassy MOFs. By integrating mechanistic insight with application-level performance, we establish dynamic bonding as a central design principle for MOFs and outline practical levers-metal identity, linker electronics and sterics, pore architecture, and crystal dimension-to tune equilibrium populations. Framed in this way, MOFs emerge not as static scaffolds but as responsive coordination networks, enabling next-generation advances in catalysis, gas storage and separations, and energy-relevant processes. 2026-02-28T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/59197 Title: FUNCTIONAL METAL-ORGANIC FRAMEWORK, METHOD FOR MANUFACTURING SAME, AND ATMOSPHERIC WATER HARVESTING APPARATUS USING SAME Author(s): 박선호; 허인철; 강민석; 유원철; 정낙천 Abstract: The method for manufacturing a functional metal-organic framework according to the present invention comprises the steps of: preparing a base metal-organic framework having a first porosity; and filling at least some of the pores of the base metal-organic framework by using a method in which the base metal-organic framework is provided with a functional oligomer, thereby manufacturing a functional metal-organic framework having a second porosity lower than the first porosity. https://scholar.dgist.ac.kr/handle/20.500.11750/59192 Title: POLYANILINE-CONTAINING METAL-ORGANIC FRAMEWORK FOR ATMOSPHERIC WATER HARVESTING USING OPEN COORDINATION SITES Author(s): 정낙천; 박선호; 유원철; 허인철 Abstract: The present invention provides a functional metal-organic framework (MOF) comprising a base metal-organic framework and a polymer formed within pores of the base metal-organic framework, wherein the base metal-organic framework comprises a metal having open coordination sites (OCS) and the polymer is formed by polymerization of an unsubstituted aniline; an aniline substituted with at least one substituent selected from the group consisting of halo, C1-C3 alkyl, C1-C3 haloalkyl, C1-C3 alkoxy, and hydroxy; or a combination thereof.