Octahedral cyanohydroxo cluster complex <i>trans</i>-[Re₆Se₈(CN)₄(OH)₂]⁴⁻: Synthesis, crystal structure, and properties

Mironov, Yuri V.,Brylev, Konstantin A.,Kim, Sung-Jin,Kozlova, Svetlana G.,Kitamura, Noboru,Fedorov, Vladimir E. Elsevier 2011 Inorganica chimica acta Vol.370 No.1

<P><B>Graphical abstract</B></P><P>New hexarhenium cyanohydroxo cluster anion [Re<SUB>6</SUB>Se<SUB>8</SUB>(CN)<SUB>4</SUB>(OH)<SUB>2</SUB>]<SUP>4−</SUP> was synthesized and crystallized as a salt of the composition Cs<SUB>2.75</SUB>K<SUB>1.25</SUB>[Re<SUB>6</SUB>Se<SUB>8</SUB>(CN)<SUB>4</SUB>(OH)<SUB>2</SUB>]·H<SUB>2</SUB>O (<B>1</B>). Based on this anion two other compounds, namely [Cu(NH<SUB>3</SUB>)<SUB>5</SUB>]<SUB>2</SUB>[Re<SUB>6</SUB>Se<SUB>8</SUB>(CN)<SUB>4</SUB>(OH)<SUB>2</SUB>]·8H<SUB>2</SUB>O and [{Cu(CH<SUB>3</SUB>NH<SUB>2</SUB>)<SUB>4</SUB>}<SUB>2</SUB>Re<SUB>6</SUB>Se<SUB>8</SUB>(CN)<SUB>4</SUB>(OH)<SUB>2</SUB>] were synthesized. All of these three compounds were characterized by a single-crystal X-ray diffraction method. The luminescence properties of <B>1</B> were studied in both aqueous solution and solid state. In addition, the electronic structure of [Re<SUB>6</SUB>Se<SUB>8</SUB>(CN)<SUB>4</SUB>(OH)<SUB>2</SUB>]<SUP>4−</SUP> was elucidated by DFT calculations.<ce:figure id='f0005'></ce:figure></P><P><B>Research highlights</B></P><P>► The partial substitution of terminal OH ligands in Re<SUB>6</SUB> cluster complex leads to <I>trans</I>-[Re<SUB>6</SUB>Se<SUB>8</SUB>(CN)<SUB>4</SUB>(OH)<SUB>2</SUB>]<SUP>4−</SUP>. ► The complex synthesized is a new multifunctional building block. ► The compound emits above 600nm in both solid phase and an aqueous solution.</P> <P><B>Abstract</B></P><P>A hexarhenium cyanohydroxo anionic cluster complex [Re<SUB>6</SUB>Se<SUB>8</SUB>(CN)<SUB>4</SUB>(OH)<SUB>2</SUB>]<SUP>4−</SUP> was synthesized for the first time starting from [Re<SUB>6</SUB>Se<SUB>8</SUB>(OH)<SUB>6</SUB>]<SUP>4−</SUP>, which was crystallized as a salt of the composition Cs<SUB>2.75</SUB>K<SUB>1.25</SUB>[Re<SUB>6</SUB>Se<SUB>8</SUB>(CN)<SUB>4</SUB>(OH)<SUB>2</SUB>]·H<SUB>2</SUB>O (<B>1</B>). The reaction of the complex with Cu<SUP>2+</SUP> in an aqueous ammonia or methylamine solutions afforded [Cu(NH<SUB>3</SUB>)<SUB>5</SUB>]<SUB>2</SUB>[Re<SUB>6</SUB>Se<SUB>8</SUB>(CN)<SUB>4</SUB>(OH)<SUB>2</SUB>]·8H<SUB>2</SUB>O (<B>2</B>) or [{Cu(CH<SUB>3</SUB>NH<SUB>2</SUB>)<SUB>4</SUB>}<SUB>2</SUB>Re<SUB>6</SUB>Se<SUB>8</SUB>(CN)<SUB>4</SUB>(OH)<SUB>2</SUB>] (<B>3</B>), respectively. All of these three compounds were characterized by a single-crystal X-ray diffraction method. Compound <B>1</B> is crystallized in the tetragonal space group <I>I</I>4<I>/m</I> with eight formula units per cell (<I>a</I>=<I>b</I>=17.4823(14)Å, <I>c</I>=19.430(2)Å, <I>V</I>=5938.3(10)Å<SUP>3</SUP>); compound <B>2</B> is crystallized in the monoclinic space group <I>P</I>2<SUB>1</SUB><I>/n</I> with two formula units per cell (<I>a</I>=12.1845(13)Å, <I>b</I>=8.6554(9)Å, <I>c</I>=19.2568(19)Å, <I>β</I>=91.081(2)°, <I>V</I>=2030.5(4)Å<SUP>3</SUP>); compound <B>3</B> is crystallized in the orthorhombic space group <I>Cmcm</I> with four formula units per cell (<I>a</I>=19.816(4)Å, <I>b</I>=14.611(3)Å, <I>c</I>=13.751(3)Å, <I>V</I>=3981.2(13)Å<SUP>3</SUP>). The luminescence properties of <B>1</B> were studied in both aqueous solution and solid state. In addition, the electronic structure of [Re<SUB>6</SUB>Se<SUB>8</SUB>(CN)<SUB>4</SUB>(OH)<SUB>2</SUB>]<SUP>4−</SUP> was elucidated by DFT calculations.</P>

A new hexanuclear rhenium cluster complex with six terminal acetate ligands: Synthesis, structure, and properties of K₄[Re₆S₈(CH₃COO)₆]·8H₂O

Brylev, Konstantin A.,Mironov, Yuri V.,Fedorov, Vladimir E.,Kim, Sung-Jin,Pietzsch, Hans-Jü,rgen,Stephan, Holger,Ito, Akitaka,Kitamura, Noboru Elsevier 2010 Inorganica chimica acta Vol.363 No.11

<P><B>Graphical abstract</B></P><P>A new hexanuclear anionic rhenium cluster complex [Re<SUB>6</SUB>S<SUB>8</SUB>(CH<SUB>3</SUB>COO)<SUB>6</SUB>]<SUP>4–</SUP> have been synthesized and characterized by X-ray single-crystal diffraction analysis, IR, <SUP>1</SUP>H NMR, UV/vis, and luminescence spectroscopies. The complex is the first demonstration of any chalcogenide hexanuclear clusters coordinated with acetic acid anions.</P><ce:figure></ce:figure> <P><B>Abstract</B></P><P>A room-temperature reaction between [Re<SUB>6</SUB>S<SUB>8</SUB>(OH)<SUB>6</SUB>]<SUP>4−</SUP> and acetic acid in an aqueous solution resulted in the substitution of all terminal hydroxo groups by acetate ligands, affording a new hexanuclear anionic rhenium cluster complex [Re<SUB>6</SUB>S<SUB>8</SUB>(CH<SUB>3</SUB>COO)<SUB>6</SUB>]<SUP>4−</SUP>. The complex was isolated as a potassium salt with the composition of K<SUB>4</SUB>[Re<SUB>6</SUB>S<SUB>8</SUB>(CH<SUB>3</SUB>COO)<SUB>6</SUB>]·8H<SUB>2</SUB>O (<B>1</B>) and characterized by X-ray single-crystal diffraction and elemental analyses, IR, <SUP>1</SUP>H NMR, UV–Vis, and luminescence spectroscopies.</P>

Photoluminescent materials based on PMMA and a highly-emissive octahedral molybdenum metal cluster complex

Efremova, Olga A.,Brylev, Konstantin A.,Vorotnikov, Yuri A.,Vejsadová,, Lucie,Shestopalov, Michael A.,Chimonides, Gwen F.,Mikes, Petr,Topham, Paul D.,Kim, Sung-Jin,Kitamura, Noboru,Sutherland, A The Royal Society of Chemistry 2016 Journal of Materials Chemistry C Vol.4 No.3

<▼1><P>Transparent yet photoluminescent, materials with facile processability are key in many applications.</P></▼1><▼2><P>Materials that combine photoluminescence, optical transparency and facile processability are of high importance in many applications. This article reports on the development of photoluminescent poly(methyl methacrylate) materials based on novel highly emissive anionic molybdenum cluster complex [{Mo6I8}(OTs)6]<SUP>2−</SUP> (where OTs<SUP>−</SUP> is the <I>p</I>-toluenesulfonate ion). The materials were obtained by both solution and bulk copolymerisation of methyl methacrylate and (dMDAEMA)2[{Mo6I8}(OTs)6], where dMDAEMA<SUP>+</SUP> is the polymerisable cation [2-(methacryloyloxy)ethyl]dimethyl-dodecylammonium. Evaluation of the resultant hybrid materials showed that one could combine the excellent photoluminescent properties of the cluster complex with the transparency and processability of PMMA.</P></▼2>

Nurses’ Experiences of End-of-life Care in Long-term Care Hospitals in Japan: Balancing Improving the Quality of Life and Sustaining the Lives of Patients Dying at Hospitals

Ryo Odachi,Tomoko Tamaki,Mikiko Ito,TaTaketoshi Okita,Yuri Kitamura,Tomotaka Sobue 한국간호과학회 2017 Asian Nursing Research Vol.11 No.3

Purpose: In Japan, about 80% of deaths occur in hospitals, especially long-term care beds. The purpose of this study was to clarify the nursing practices used for such older patients at the end-of-life stage in longtermcare wards via the modified grounded theory approach (M-GTA). Methods: Data were obtained through semi-structured interviews of nineteen nurses working in cooperating long-term care wards, acute care wards, or hospice services (to allow for constant comparison between these types of wards) in western Japan in 2014. We analyzed the transcribed data using M-GTA. Results: The core category that emerged from the analysis was “Balancing enhancement of patients' daily life quality and life-sustaining care in the face of uncertainty about the patients' character.” Eleven categories emerged, such as Seeking older patients' character with their family, Supporting families' decision making, Rebuilding patients' daily life in the ward, and Sustaining patients' life span through medical care. Conclusions: Nurses experienced uncertainty about the care needs of older patients, the ethical problems of Enhancing the patients' QOL by using risky care, and the evaluation criteria used to judge their own nursing care after the patients' death. All nurses had the goal of ensuring a natural death for all patients. Nurses' acceptance and evaluation of their own care was critically influenced by the patient's family's responses to their care after patients' death. Further research is necessary to develop evaluation criteria and educational programs for end-of-life nursing care of older adults.