Pohang University of Science and Technology · Materials Science
김운범 교수의 연구실은 주로 분자 간 비공유 상호작용을 기반으로 한 고도의 정밀한 분자 설계와 상호작용 제어를 핵심으로 합니다. 쿠루브리톨(Cucurbituril)을 중심으로 한 분자 간 인식, 다중상호작용을 통한 안정한 복합체 형성, 그리고 이를 응용한 분자 기계, 분자 스위치, 프로톤 전도체 등 기능성 초분자 구조체의 설계와 합성을 주요 연구 방향으로 삼고 있습니다. 특히, 고정도 분자 인식과 동적 상호작용을 통해 새로운 기능성 물질과 소재를 창출하는 데 초점을 맞추고 있습니다.
Figures are computed from collected data and may differ slightly.
A large H2 sorption capacity and high surface area are properties of the depicted metal–organic porous material, which is easily synthesized on a large scale from readily available chemicals. The rigid framework of [Zn2(1,4-bdc)2(dabco)] (1,4-H2bdc=1,4-benzenedicarboxylic acid; dabco=diazabicyclo[2.2.2]octane) is also flexible enough to exhibit unusual guest-dependent dynamic behavior, as shown (DMF=N,N-dimethylformamide).
Mechanically interlocked molecules incorporating cucurbituril (CB[6]) as a molecular 'bead' and their supramolecular assemblies are described. An efficient synthesis of 1D, 2D and 3D polyrotaxanes with high structural regularity and molecular necklaces has been achieved by a combination of self-assembly and coordination chemistry. The functional aspects of these interlocked molecules and their supramolecular assemblies, including molecular machines and switches based on [2]rotaxanes, a 2D polyro
Cucurbit[n]uril (CB[n], n = 5-10), a new family of molecular hosts comprising n glycoluril units, have gained much attention in the new millennium for their exceptional molecular recognition ability. The CB homologues have brought dynamism to CB chemistry, as witnessed by the heightened interest in the field for the last several years. Compared to the chemistry of cyclodextrins and calixarenes, however, that of CB[n] has developed slowly until recently, which may be attributed mainly to their po
Proton-conducting materials are an important component of fuel cells. Development of new types of proton-conducting materials is one of the most important issues in fuel-cell technology. Herein, we present newly developed proton-conducting materials, modularly built porous solids, including coordination polymers (CPs) or metal-organic frameworks (MOFs). The designable and tunable nature of the porous materials allows for fast development in this research field. Design and synthesis of the new ty
Host-stabilized charge-transfer (CT) interactions and supramolecular assemblies built with these interactions are described. A variety of supramolecular assemblies including polyrotaxanes, molecular necklaces, and rotaxane dendrimers were synthesized through the intramolecular or intermolecular host-stabilized CT complex formation using cucurbit[8]uril (CB[8]) and D-A molecules having both electron-donor and electron-acceptor units connected by various types of linkers. Applications, including t
The design of synthetic, monovalent host-guest molecular recognition pairs is still challenging and of particular interest to inquire into the limits of the affinity that can be achieved with designed systems. In this regard, cucurbit[7]uril (CB[7]), an important member of the host family cucurbit[n]uril (CB[n], n = 5-8, 10, 14), has attracted much attention because of its ability to form ultra-stable complexes with multiple guests. The strong hydrophobic effect between the host cavity and guest
The binding stoichiometry of a host-guest complex can be effectively controlled by the redox chemistry of the guest: a 1:1 inclusion complex of methylviologen dication (MV2+) in cucurbit[8]uril (CB[8]) converts completely and reversibly to a 2:1 inclusion complex of cation radical (MV+.) in CB[8] upon the reduction of the guest.
Separation of acetylene from carbon dioxide and ethylene is challenging in view of their similar sizes and physical properties. Metal-organic frameworks (MOFs) in general are strong candidates for these separations owing to the presence of functional pore surfaces that can selectively capture a specific target molecule. Here, we report a novel 3D microporous cationic framework named JCM-1. This structure possesses imidazolium functional groups on the pore surfaces and pyrazolate as a metal bindi
Oxaliplatin forms a stable 1:1 inclusion complex with cucurbit[7]uril as indicated by NMR, mass spectrometry, isothermal titration calorimetry and X-ray crystallography. The encapsulation of the drug results in a large enhancement in stability, a moderate decrease in reactivity toward guanosine but a much larger decrease in reactivity toward L-methionine, which suggests the encapsulation not only increases the stability of the drug but also may reduce unwanted side effects caused by protein bind
A new 3D metal-organic framework with a (3,4)-connected network topology is synthesized from an ionic liquid medium; its highly symmetrical structure comprises doubly interpenetrating nets with the cubic-C3N4 topology.
The [2 + 2] photoreaction of (E)-diaminostilbene dihydrochloride proceeds with large rate acceleration and high stereoselectivity via formation of a stable 1:2 host-guest complex with curcurbit[8]uril in solution.
Ein großes H2-Sorptionsvermögen und eine große Oberfläche kennzeichnen ein metall-organisches poröses Material, das leicht ausgehend von gut verfügbaren Reaktanten synthetisiert werden kann. Das starre Gerüst von [Zn2(1,4-bdc)2(dabco)] (1,4-H2bdc=1,4-Benzoldicarbonsäure, dabco=Diazabicyclo[2.2.2]octan) ist zudem noch ausreichend flexibel, um ein ungewöhnliches, gastabhängiges dynamisches Verhalten zu zeigen (siehe Schema, DMF=Dimethylformamid).
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTStructure and Mössbauer Spectrum of a (μ-1,2-Peroxo)bis(μ-carboxylato)diiron(III) Model for the Peroxo Intermediate in the Methane Monooxygenase Hydroxylase Reaction CycleKimoon Kim and Stephen J. LippardView Author Information Department of Chemistry Massachusetts Institute of Technology Cambridge, Massachusetts 02139 Cite this: J. Am. Chem. Soc. 1996, 118, 20, 4914–4915Publication Date (Web):May 22, 1996Publication History Received12 February 1
A new approach to the synthesis of hierarchical micro- and mesoporous MOFs from microporous MOFs involves a simple hydrolytic post-synthetic procedure. As a proof of concept, a new microporous MOF, POST-66(Y), was synthesized and its transformation into a hierarchical micro- and mesoporous MOF by water treatment was studied. This method produced mesopores in the range of 3 to 20 nm in the MOF while maintaining the original microporous structure, at least in part. The degree of micro- and mesopor
Abstract The porphyrin boxes ( PB‐1 and PB‐2 ), which are rationally designed porous organic cages with a large cavity using well‐defined and rigid 3‐connected triangular and 4‐connected square shaped building units are reported. PB‐1 has a cavity as large as 1.95 nm in diameter and shows high chemical stability in a broad pH range (4.8 to 13) in aqueous media. The crystalline nature as well as cavity structure of the shape‐persistent organic cage crystals were intact even after complete removal
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