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Hoseop Yun,Yongkwan Dong,Jungwook Kim,Song-i Hahn,Junghwan Do 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.8
Three new quaternary tantalum thiophosphates, K0.18TaPS6, K0.28TaPS6, and Rb0.09TaPS6 have been synthesized by using reactive alkali metal halide fluxes and structurally characterized by single crystal X-ray diffraction techniques. The crystal structures of K0.18TaPS6, K0.28TaPS6, and Rb0.09TaPS6 contain 3-dimensional open framework anions, [TaPS6]x (x = 0.09, 0.18, 0.28) with the empty channel which disordered alkali metal cations, K+ and Rb+ are located in. Crystal data: K0.18TaPS6, tetragonal, space group I41/acd (no. 142), a=15.874(3) Å, c=13.146(4) Å, V=3312.7(12) Å3, K, Z=16, R1=0.0545. Crystal data: K0.28TaPS6, tetragonal, space group I41/acd (no. 142), a=15.880(2) Å, c=13.134(3) Å, V=3312.1(10) Å3, Z=16, R1=0.0562. Crystal data: Rb0.09TaPS6, tetragonal, space group I41/acd (no. 142), a=15.893(3) Å, c=13.163(4) Å, V=3324.7(15) Å3, Z=16, R1=0.0432.
New organic 4‐(4‐methoxystyryl)‐1‐methylpyridinium crystals for nonlinear optical applications
Yun-Sang Lee,O-Pil Kwon,Woojin Yoon,Hoseop Yun,Mojca Jazbinsek4,In Cheol Yu,Fabian Rotermund,Dongwook Kim 대한화학회 2022 Bulletin of the Korean Chemical Society Vol.43 No.11
In this study, an organic nonlinear optical salt crystal, 4-(4-methoxystyryl)-1-methylpyridinium 4-bromobenzenesulfonate (MOS-BBS), is newly reported. MOS-BBS crystals exhibit perfectly parallel molecular ordering of 4-(4-methoxystyryl)-1-methylpyridinium (MOS) cationic chromophores with noncentrosymmetric P1space group symmetry, which provides an optimal configuration for maximizing themacroscopic second-order optical nonlinearity. The macroscopic optical nonlinearityof the MOS-BBS crystals is very large, with the diagonal effective first hyperpolarizabilityof 160 1030 esu. Furthermore, the MOS-BBS crystals exhibit a high thermalcrystal-phase stability. The lowest phase transition temperature of the MOS-BBS crystalsis 265C, which is ~90C higher than that of previously reported MOS-basedcrystals.
Hoseop Yun,Junghwan Do* 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.1
Two new barium vanadium borophosphate compounds, (NH4)2(C2H10N2)6[Ba(H2O)5]2[V2P2BO12]6·8H2O, Ba- VBPO1 and (NH4)8(C3H12N2)4[Ba(H2O)7][V2P2BO12]6·17H2O, Ba-VBPO2 have been synthesized by interdiffusion methods in the presence of diprotonated ethylenediamine and 1,3-diaminopropane. Compound Ba-VBPO1 has an infinite chain anion {[Ba(H2O)5]2[V2P2BO12]6}14−, whereas Ba-VBPO2 has a discrete cluster anion {[Ba(H2O)7][V2P2BO12]6}16−. Crystal Data: (NH4)2(C2H10N2)6[Ba(H2O)5]2[V2P2BO12]6·8H2O, triclinic, space group P1 (no. 2), a = 13.7252(7) Å, b = 15.7548(8) Å, c = 15.8609(8) Å, α = 63.278(1)o, β =75.707(1)o, γ = 65.881(1)o, Z = 1; (NH4)8(C3H12N2)4[Ba(H2O)7][V2P2BO12]6·17H2O, monoclinic, space group C2/c (no. 15), a = 31.347(2) Å, b = 17.1221(9) Å, c = 22.3058(1) Å, β = 99.303(1)o, Z = 4.
Sangwon Yun,Boohwi Hong,Hoseop Kim,Woosuk Chung,Youngkwon Ko,Yoon-Hee Kim 조선대학교 의학연구원 2021 Medical Bilogical Science and Engineering Vol.4 No.1
Cerebral venous sinus thrombosis (CVST), a rare cerebrovascular event, occurs in approximately 5 out of 1,000,000 people. Because subarachnoid hemorrhage (SAH) due to CVST during emergency cesarean section is rare, this condition is difficult to recognize and diagnose in patients under anesthesia. This report describes a parturient who experienced severe headache and motor weakness during an emergency cesarean section. The first manifestation of CVST was a severe headache, which overlapped with the presentation of SAH, making early diagnosis verydifficult. Anesthesiologists should be aware of the risk of CVST in pregnant women and closely monitor those who experience slight changes in intraoperative neurological symptoms.
이강민,윤우진,Yun Hoseop,Lee Soon W. 대한화학회 2021 Bulletin of the Korean Chemical Society Vol.42 No.4
A novel pincer-type ligand L2 (40-(4-(6-methoxypyridin-3-yl)phenyl)-2,20:60,200-terpyridine), a terpyridine derivative, was prepared by Suzuki–Miyaura C C coupling. Under heating conditions in ethanol, ligands L1 (40-(4-bromophenyl)-2,20:60,200-terpyridine) and L2 reacted with Cd(NO3)24H2O to produce [Cd(L1) (NO3)2(H2O)] (1) and [Cd(L2)(NO3)2(H2O)](H2O) (2), respectively. In complexes 1 and 2, the sevencoordinate cadmium metal is coordinated to one terpyridine ligand, two nitrato ligands, and an aqua ligand. Under heating conditions in acetonitrile at 120 C, complex 1 was converted into a 1:1 mixture (3) of [Cd2L2(NO3-κ3O,O0,O00)(NO3-κ2O,O0)3] (3a) and [CdL(NO3-κ2O,O0)2] (3b). When complex 1 was treated with 4,40-bipyridine (bpy) under hydrothermal conditions, a one-dimensional linear coordination polymer [[Cd(L1)(bpy)(NO3)](NO3)(H2O)2]∞ (4) was produced. Complex 1 reacted with 4-((E)- 2-(pyridin-4-yl)vinyl)pyridine (bpe) in ethanol under microwave-heating conditions to produce a dimeric complex [Cd2(L1)2(bpe)(EtOH)2(NO3)2)](NO3)2 (5). Solid-state photoluminescent spectra of all complexes displayed a ligand-based π–π* emission band.
Wang, Di,Yun, Hoseop,Kim, Kang-Woo unknown 2017 ZEITSCHRIFT FUR KRISTALLOGRAPHIE NEW CRYSTAL STRUC Vol.232 No.6
<P>C10H28N2PdSe14, monoclinic, P2(1)/c (no. 14), a=9.4146(7) angstrom, b=14.3446(11) angstrom, c=12.4731(9) angstrom, beta=113.403(2)degrees, V=1545.9(2) angstrom(3), Z=2, R-gt(F)=0.0510, wR(ref)(F-2)=0.1446, T=293 K.</P>
Junghwan Do,Yoonsuk Cho,Hoseop Yun,Kyungna Jung 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.8
Two new copper vanadium borophosphate compounds, (NH4)(C2H10N2)5.5[Cu(C2H8N2)2]3[V2P2BO12]6•17H2O, Cu-VBPO1 and (NH4)(C2H10N2)3.5[Cu(C2H8N2)2]5[V2P2BO12]6•18H2O, Cu-VBPO2 have been hydrothermally synthesized and characterized by single crystal X-ray diffraction, thermogravimetric analysis, IR spectroscopy, and elemental analysis. The structure of Cu-VBPO1 contains a layer anion, {[Cu(C2H8N2)2]3[V2P2BO12]6}12, whereas Cu-VBPO2 has an open framework anion, {[Cu(C2H8N2)2]5[V2P2BO12]6}8. Crystal Data: (NH4)(C2H10N2)5.5[Cu(C2H8N2)2]3[V2P2BO12]6•17H2O, monoclinic, space group I2/m (no. 12), a = 15.809(1) Å, b = 31.107(2) Å, c = 12.9343(8) Å, = 104.325(1)o, Z = 2; (NH4)(C2H10N2)3.5[Cu(C2H8N2)2]5[V2P2BO12]6• 18H2O, tetragonal, space group P42/mnm (no.136), a = 26.832(1) Å, c = 18.021(1) Å, Z = 4.