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Moon, Hoi Ri,Suh, Myunghyun Paik WILEY‐VCH Verlag 2010 European journal of inorganic chemistry Vol.2010 No.24
<P><B>Abstract</B></P><P>The coordination polymer {[Ni(C<SUB>20</SUB>H<SUB>32</SUB>N<SUB>8</SUB>)]<SUB>2</SUB>[TCM]}<B>·</B>5DMF<B>·</B>8H<SUB>2</SUB>O (<B>1</B>) has been assembled from a Ni<SUP>II</SUP> macrocyclic complex that contains two pyridyl pendant arms, [Ni(C<SUB>20</SUB>H<SUB>32</SUB>N<SUB>8</SUB>)](ClO<SUB>4</SUB>)<SUB>2</SUB>, and sodium tetrakis[4‐(carboxyphenyl)oxamethyl]methane (Na<SUB>4</SUB>TCM) in DMF/water. The X‐ray structure of <B>1</B> reveals that the pyridyl pendant arms in the macrocyclic complex play a crucial role in determining the network structure through the π–π interactions. Compound <B>1</B> forms doubly catenated rhombic grids that generate 1D channels. It exhibits flexible behavior upon desorption/resorption and exchange of organic guest molecules as well as temperature change. Solid <B>1</B> is redox active due to the incorporated Ni<SUP>II</SUP> macrocyclic species, and reacts with Pd(NO<SUB>3</SUB>)<SUB>2</SUB> dissolved in acetonitrile at room temperature to produce small Pd nanoparticles [(2.9 ± 0.4) nm in diameter] in the channels in the absence of extra reducing or capping agents.</P>
Lee, Jae Hwa,Moon, Byoungnam,Kim, Tae Kyung,Jeoung, Sungeun,Moon, Hoi Ri The Royal Society of Chemistry 2015 Dalton Transactions Vol.44 No.34
<▼1><P>Thermal conversion of a Li- and Si-containing MOF produces ceramic Li4SiO4 with a coral-like morphology, which is an advanced CO2 absorbent with high uptake and fast absorption.</P></▼1><▼2><P>The conversion reaction of metal–organic frameworks (MOFs) was adopted as a synthetic method to produce an advanced CO2 absorbent. A Li- and Si-containing MOF is a good precursor for lithium orthosilicate (Li4SiO4); the resulting solid has an unusual coral-like morphology, which provides an enhanced CO2-sorption performance (high uptake and fast absorption).</P></▼2>
Lee, Yong-Gon,Moon, Hoi Ri,Cheon, Young Eun,Suh, Myunghyun Paik WILEY-VCH Verlag 2008 Angewandte Chemie Vol.120 No.40
<B>Graphic Abstract</B> <P>Die isostrukturellen metall-organischen Netzwerke [{Zn<SUB>2</SUB>(abtc)(dmf)<SUB>2</SUB>}<SUB>3</SUB>] (1), [{Cu<SUB>2</SUB>(abtc)(dmf)<SUB>2</SUB>}<SUB>3</SUB>] (2) und [{Cu<SUB>2</SUB>(abtc)}<SUB>3</SUB>] (3; H<SUB>4</SUB>abtc=1,1′-Azobenzol-3,3′,5,5′-tetracarbonsäure) absorbieren H<SUB>2</SUB>, N<SUB>2</SUB>, CO<SUB>2</SUB> und CH<SUB>4</SUB>. Festes 3, das im Unterschied zu 1 und 2 zugängliche Metallzentren enthält, hat eine höhere H<SUB>2</SUB>-Adsorptionskapazität als die anderen Netzwerke (siehe Diagramm; T=77 K), weil sein Molekulargewicht geringer und seine isosterische Adsorptionswärme für die H<SUB>2</SUB>-Adsorption höher ist. <img src='wiley_img/00448249-2008-120-40-ANGE200801488-content.gif' alt='wiley_img/00448249-2008-120-40-ANGE200801488-content'> </P>
MOF-on-MOF Architectures: Applications in Separation, Catalysis, and Sensing
Hong Doo Hwan,Shim Hui Su,하준수,Moon Hoi Ri 대한화학회 2021 Bulletin of the Korean Chemical Society Vol.42 No.7
Metal–organic frameworks (MOFs) are porous crystalline materials with a high tunability. To improve the functionality of the original frameworks, several strategies, such as the use of different metal cations and organic ligands and post-synthetic modification, have been developed, enabling the use of MOFs in numerous practical applications in various fields. Recently, another approach, i.e., MOF-on-MOF architecturing, has been actively studied by combining two or more MOFs into a composite. MOF-on- MOF materials not only possess the intrinsic properties of each MOF but also exhibit unprecedented synergism within a single system, resulting in a considerable potential for various applications. This review summarizes the interesting areas of application of MOF-on-MOF architectures into three categories: separation, catalysis, and sensing. In particular, the synergism occurring within such MOF-on-MOF architectures is discussed.
Kim, Tae Kyung,Lee, Jae Hwa,Moon, Dohyun,Moon, Hoi Ri American Chemical Society 2013 Inorganic Chemistry Vol.52 No.2
<P>A luminescent lithium metal–organic framework (MOF) is constructed from the solvothermal reaction of Li<SUP>+</SUP> and a well-designed organic ligand, bis(4-carboxyphenyl)-<I>N</I>-methylamine (H<SUB>2</SUB>CPMA). A Li-based MOF can detect an explosive aromatic compound containing nitro groups as an explosophore, by showing a dramatic color change with concurrent luminescence quenching in the solid state. The detection sites are proven directly through single-crystal-to-single-crystal transformations, which show strong interactions between the aromatic rings of the electron-rich CPMA<SUP>2–</SUP> molecules and the electron-deficient nitrobenzene.</P><P>A luminescent lithium metal−organic framework constructed from Li<SUP>+</SUP> and a well-designed organic ligand can selectively detect explosive nitroaromatic compounds by showing a dramatic color change with concurrent luminescence quenching in the solid state. The detection sites are proven directly through single-crystal-to-single-crystal transformations.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/inocaj/2013/inocaj.2013.52.issue-2/ic3011458/production/images/medium/ic-2012-011458_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ic3011458'>ACS Electronic Supporting Info</A></P>
Saji, Viswanathan S,Jo, Yimhyun,Moon, Hoi Ri,Jun, Yongseok,Song, Hyun-Kon Springer 2011 Nanoscale research letters Vol.6 No.1
<P>There are many practical difficulties in direct adsorption of polymers onto nanocrystalline inorganic oxide surface such as Al<SUB>2</SUB>O<SUB>3 </SUB>and TiO<SUB>2 </SUB>mainly due to the insolubility of polymers in solvents or polymer agglomeration during adsorption process. As an alternative approach to the direct polymer adsorption, we propose surface-bound polymerization of pre-adsorbed monomers. 6-(3-Thienyl)hexanoic acid (THA) was used as a monomer for poly[3-(5-carboxypentyl)thiophene-2,5-diyl] (PTHA). PTHA-coated nanocrystalline TiO<SUB>2</SUB>/FTO glass electrodes were prepared by immersing THA-adsorbed electrodes in FeCl<SUB>3 </SUB>oxidant solution. Characterization by ultraviolet/visible/infrared spectroscopy and thermal analysis showed that the monolayer of regiorandom-structured PTHA was successfully formed from intermolecular bonding between neighbored THA surface-bound to TiO<SUB>2</SUB>. The anchoring functional groups (-COOH) of the surface-crawling PTHA were completely utilized for strong bonding to the surface of TiO<SUB>2</SUB>.</P>
Mix-and-Match Assembly of Block Copolymer Blends in Solution
Cho, Arah,La, Yunju,Jeoung, Sungeun,Moon, Hoi Ri,Ryu, Ja-Hyoung,Shin, Tae Joo,Kim, Kyoung Taek American Chemical Society 2017 Macromolecules Vol.50 No.8
<P>The chemical structure of a block copolymer (BC?) dictates the size, shape, and function of its self-assembled structure in solution. This direct correspondence demands precision synthesis of a specific BCP with optimized structural parameters to obtain the desired nanostructures with structural and functional complexity by solution self-assembly. Here we show that the binary blends of BCPs self-assemble into the desired nanostructure in solution by adjusting the composition of the blend. By modifying the structural parameters of a binary BCP blend through control of the composition, two BCPs sharing the repeating units in both polymer blocks coassemble into the desired structures, which range from spherical micelles to inverse cubic and hexagonal mesophases. These BCP blends not only allow the direct creation of complex periodic mesoporous structures of the desired periodicity and pore size but also provide nanostructures of unprecedented morphology by simple solution self-assembly without relying on the synthesis of correspondingly designed BCPs.</P>