Syntheses, structures and antimicrobial activities of various metal complexes of hinokitiol

Nomiya, Kenji; Onodera, Kuniaki; Tsukagoshi, Ken; Shimada, Kouhei; Yoshizawa, Akira; Itoyanagi, Tada-aki; Sugie, Akiyoshi; Tsuruta, Shinichiro; Sato, Ryo; Kasuga, Noriko Chikaraishi

doi:10.1016/j.ica.2008.02.061

Cited by 36 publications

(38 citation statements)

References 52 publications

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“…[13] After adsorption on TiO 2 ,t he spectrum showed broadening of the peaks,a so bserved for tropolonemetal bidentate complexes. [8] To gain further information on the binding mode,w ec onducted X-ray photoelectron spectroscopy (XPS) measurements for TiO 2 stained with YD2-o-C8T as well as reference compounds (see Figures S9-S11). TheO 1s photoelectron spectrum exhibited three oxygen peaks.The peak observed at 529.9 eV originates from oxygen atoms of the TiO 2 surface.T he remaining peaks at 532.8 and 531.5 eV are ascribed to four oxygen atoms of the octyloxy moiety and two oxygen atoms of the tropolone moiety attached to the TiO 2 surface,r espectively.F rom these XPS measurements,combined with the FTIR spectra, we assigned the binding mode of YD2-o-C8T on TiO 2 as symmetrical bidentate coordination.…”

Section: à2mentioning

confidence: 99%

“…[8] Ar esonance structure,t he aromatic tropylium ion, contributes to the electronic structure of tropolones (Scheme 1). In this respect, tropolones can act as an electronwithdrawing motif in p systems.R eports based on the use of tropolones as the key motif of functional molecules are still limited, whereas metal complexes of tropolones have been employed as building blocks for supramolecular coordination complexes [9] and stable liquid crystals.…”

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confidence: 99%

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Tropolone as a High‐Performance Robust Anchoring Group for Dye‐Sensitized Solar Cells

et al. 2015

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A tropolone group has been employed for the first time as an anchoring group for dye-sensitized solar cells (DSSCs). The DSSC based on a porphyrin, YD2-o-C8T, with a tropolone moiety exhibited a power-conversion efficiency of 7.7 %, which is only slightly lower than that observed for a reference porphyrin, YD2-o-C8, with a conventional carboxylic group. More importantly, YD2-o-C8T was found to be superior to YD2-o-C8 with respect to DSSC durability and binding ability to TiO2 . These results unambiguously demonstrate that tropolone is a highly promising dye-anchoring group for DSSCs in terms of device durability as well as photovoltaic performance.

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Section: à2mentioning

confidence: 99%

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confidence: 99%

Tropolone as a High‐Performance Robust Anchoring Group for Dye‐Sensitized Solar Cells

et al. 2015

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“…However, these structures are not available in the Cambridge Structural Database. A series of metal compounds with 4-isopropyltropolone (hinokitiol, Hhino), including [Bi(hino) 3 EtOH] complex, have been synthesized recently [18].…”

Section: Introductionmentioning

confidence: 99%

Influence of pH and type of counterion on the formation of bismuth(III) complexes with tropolonato and 5-methyltropolonato ligands: Synthesis, structure, spectroscopic characterization and calculation studies

Łyczko

Lyczko

Woźniak

et al. 2015

Inorganica Chimica Acta

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“…The oldest work is by Acland and Freeman (1971), who reported silver glycinate in anhydrous form and as a hemihydrate. The hemihydrate was later refined by Nomiya and Yokoyama (2002), who also reported antimicrobial activities of this species (along with the silver salts of aspartic acid and asparagine; see Sect. 3.8).…”

Section: Glycinementioning

confidence: 99%

“…Nomiya and Yokoyama (2002), who also tested the antimicrobial activities of silver glycinate, published the structure of (DL-hydrogen aspartato)-silver hydrate. In this crystal, the Ag + cations form dimers, which are connected to layers by the hydrogen aspartate anions.…”

Section: Tris(l-cysteinato-s)-bismuth Monohydrate Comprises [3]-coordmentioning

confidence: 99%

Compounds of Amino Acids as Anions

Fleck

Petrosyan

2014

Salts of Amino Acids

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This chapter deals with salts formed from metal cations and amino acid anions. All amino acids can act as monovalent anion; the acidic members glutamic acid and aspartic acid as well as cysteine and tyrosine can form both monovalent and divalent anions. Due to the large number of available cations, a multitude of combinations is possible and in fact found (for the standard twenty amino acids, over 150 crystal structures are published, and many more species have been characterized by other methods). Different hydration states (as reported for the pristine amino acid crystals) occur as well, and the existence of polymorphs is also documented for some cases. The formation of metal-amino acid complexes has been studied in several works (both for a given amino acid and a given cation), and the flexibility of amino acid molecules as ligands allows coordination of cations with different chemical properties (such as charge or ionic radius). Several coordination modes are found for amino acids -the molecules can act as monodentate, bidentate, tridentate, and bridging ligands. The connectivity of the coordination polyhedra of the metal cations is considered -isolated units are frequent, but chains and layers occur as well. Moreover, these units can connect via amino acid molecules to form higher-dimensional structures. Hydrogen bonds (also involving water molecules, both in coordination or in the interstices as crystal water) further stabilize the units, forming relatively stable phases. The frequency of salts varies among the different amino acids, and most examples are reported for glycinate salts, whereas crystals of cations and basic and weakly soluble amino acids are difficult to obtain (e.g., arginate and lysinate salts have not been reported in crystalline state). Finally, the aspect of symmetry is considered (the chirality of most amino acids playing a crucial role), and, consequently, the properties of these salts have impact on applications in the fields of physics, biology, and medicine.

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Syntheses, structures and antimicrobial activities of various metal complexes of hinokitiol

Cited by 36 publications

References 52 publications

Tropolone as a High‐Performance Robust Anchoring Group for Dye‐Sensitized Solar Cells

Tropolone as a High‐Performance Robust Anchoring Group for Dye‐Sensitized Solar Cells

Influence of pH and type of counterion on the formation of bismuth(III) complexes with tropolonato and 5-methyltropolonato ligands: Synthesis, structure, spectroscopic characterization and calculation studies

Compounds of Amino Acids as Anions

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