76
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Ogawa K, Dy J, Maeda R, Nagatsuka Y, Kamada K, Kobuke Y. Synthesis and photophysical properties of a porphyrin-perinaphthothioindigo dye. J PORPHYR PHTHALOCYA 2013. [DOI: 10.1142/s1088424613500521] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A new porphyrin-perinaphthothioindigo composite, where porphyrin and perinaphthothioindigo dye are connected though a triple bond, was synthesized. In UV-vis absorption spectra of the composite, absorption originating from the trans-isomer appeared at 655 nm. Upon photoirradiation at > 700 nm, the intensity of this absorption decreased with increase of absorption of the cis-isomer around at 530 nm. The HOMO–LUMO absorption of the cis-isomer is blue-shifted by 125 nm compared to that of trans-isomer due to the lack of π-conjugation. The 2PA cross-section values obtained for both isomers were 2,000 and 700 GM, respectively. The value of 2,000 GM is of the largest class among the values reported for photochromic compounds. The enhancement factors by the connection of porphyrin to perinaphthothioindigo were found to be 3.5–3.9 by measuring cross-section values of bis(TMS-ethynyl)perinaphthothioindigo as the reference compound. Two-photon isomerization of the trans-isomer to the cis-isomer was successfully conducted using femtosecond pulses.
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Navarro JRG, Lerouge F, Cepraga C, Micouin G, Favier A, Chateau D, Charreyre MT, Lanoë PH, Monnereau C, Chaput F, Marotte S, Leverrier Y, Marvel J, Kamada K, Andraud C, Baldeck PL, Parola S. Nanocarriers with ultrahigh chromophore loading for fluorescence bio-imaging and photodynamic therapy. Biomaterials 2013; 34:8344-51. [PMID: 23915950 DOI: 10.1016/j.biomaterials.2013.07.032] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 07/08/2013] [Indexed: 12/13/2022]
Abstract
We describe the design of original nanocarriers that allows for ultrahigh chromophore loading while maintaining the photo-activity of each individual molecule. They consist in shells of charged biocompatible polymers grafted on gold nanospheres. The self-organization of extended polymer chains results from repulsive charges and steric interactions that are optimized by tuning the surface curvature of nanoparticles. This type of nano-scaffolds can be used as light-activated theranostic agents for fluorescence imaging and photodynamic therapy. We demonstrate that, labeled with a fluorescent photosensitizer, it can localize therapeutic molecules before triggering the cell death of B16-F10 melanoma with an efficiency that is similar to the efficiency of the polymer conjugate alone, and with the advantage of extremely high local loading of photosensitizers (object concentration in the picomolar range).
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78
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Bourdolle A, Allali M, D'Aléo A, Baldeck PL, Kamada K, Williams JAG, Le Bozec H, Andraud C, Maury O. Influence of the Metal Ion on the Two‐Photon Absorption Properties of Lanthanide Complexes Including Near‐IR Emitters. Chemphyschem 2013; 14:3361-7. [DOI: 10.1002/cphc.201300501] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Indexed: 11/11/2022]
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79
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Tahara K, Yamamoto Y, Gross DE, Kozuma H, Arikuma Y, Ohta K, Koizumi Y, Gao Y, Shimizu Y, Seki S, Kamada K, Moore JS, Tobe Y. Syntheses and properties of graphyne fragments: trigonally expanded dehydrobenzo[12]annulenes. Chemistry 2013; 19:11251-60. [PMID: 23821553 DOI: 10.1002/chem.201300838] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 05/14/2013] [Indexed: 11/11/2022]
Abstract
We present herein the synthesis and properties of the largest hitherto unknown graphyne fragment, namely trigonally expanded tetrakis(dehydrobenzo[12]annulene)s (tetrakis-DBAs). Intramolecular three-fold alkyne metathesis reactions of hexakis(arylethynyl)DBAs 9 a and 9 b using Fürstner's Mo catalyst furnished tetrakis-DBAs 8 a and 8 b substituted with tert-butyl or branched alkyl ester groups in moderate and fair yields, respectively, demonstrating that the metathesis reaction of this protocol is a powerful tool for the construction of graphyne fragment backbones. For comparison, hexakis(arylethynyl)DBAs 9 c-g have also been prepared. The one-photon absorption spectrum of tetrakis-DBA 8 a bearing tert-butyl groups revealed a remarkable bathochromic shift of the absorption cut-off (λcutoff ) compared with those of previously reported graphyne fragments due to extended π-conjugation. Moreover, in the two-photon absorption spectrum, 8 a showed a large cross-section for a pure hydrocarbon because of the planar para-phenylene-ethynylene conjugation pathways. Hexakis(arylethynyl)-DBAs 9 c-e and 9 g and tetrakis-DBA 8 b bearing electron-withdrawing groups aggregated in chloroform solutions. Comparison between the free energies of 9 e and 8 b bearing the same substituents revealed the more favorable association of the latter due to stronger π-π interactions between the extended π-cores. Polarized optical microscopy observations, DSC, and XRD measurements showed that 8 b and 9 e with branched alkyl ester groups displayed columnar rectangular mesophases. By the time-resolved microwave conductivity method, the columnar rectangular phase of 8 b was shown to exhibit a moderate charge-carrier mobility of 0.12 cm(2) V(-1) s(-1) . These results indicate that large graphyne fragments can serve as good organic semiconductors.
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80
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Mizuki S, Murakami T, Oryoji K, Kamada K, Yokota E. AB0256 Risk factors associated with generalized bone loss in patients with rheumatoid arthritis: retrospective longitudinal study. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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81
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Mizuki S, Murakami T, Oryoji K, Kamada K, Yokota E. THU0455 Survey of primary care physicians’ attitudes to co-management medical collaboration in treatment of rheumatoid arthritis: Comparison between physicians with and without rheumatology board certification. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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82
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Konishi A, Hirao Y, Matsumoto K, Kurata H, Kishi R, Shigeta Y, Nakano M, Tokunaga K, Kamada K, Kubo T. Synthesis and Characterization of Quarteranthene: Elucidating the Characteristics of the Edge State of Graphene Nanoribbons at the Molecular Level. J Am Chem Soc 2013; 135:1430-7. [DOI: 10.1021/ja309599m] [Citation(s) in RCA: 199] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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83
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Matsui K, Segawa Y, Namikawa T, Kamada K, Itami K. Synthesis and properties of all-benzene carbon nanocages: a junction unit of branched carbon nanotubes. Chem Sci 2013. [DOI: 10.1039/c2sc21322b] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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84
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Arikawa Y, Hosoda H, Nagai T, Watanabe K, Yamanoi K, Cadatal-Raduban M, Shimizu T, Sarukura N, Nakai M, Norimatsu T, Azechi H, Izumi N, Murata T, Suyama T, Yoshikawa A, Kamada K, Usuki Y, Satoh N, Kan H. Multichannel down-scattered neutron detector for areal density measurement. EPJ WEB OF CONFERENCES 2013. [DOI: 10.1051/epjconf/20135913011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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85
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Kamada K, Fuku-en SI, Minamide S, Ohta K, Kishi R, Nakano M, Matsuzaki H, Okamoto H, Higashikawa H, Inoue K, Kojima S, Yamamoto Y. Impact of Diradical Character on Two-Photon Absorption: Bis(acridine) Dimers Synthesized from an Allenic Precursor. J Am Chem Soc 2012; 135:232-41. [DOI: 10.1021/ja308396a] [Citation(s) in RCA: 122] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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86
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Nikl M, Kamada K, Kurosawa S, Yokota Y, Yoshikawa A, Pejchal J, Babin V. Luminescence and scintillation mechanism in Ce3+and Pr3+doped (Lu,Y,Gd)3(Ga,Al)5O12single crystal scintillators. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pssc.201200499] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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87
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Navarro JRG, Manchon D, Lerouge F, Blanchard NP, Marotte S, Leverrier Y, Marvel J, Chaput F, Micouin G, Gabudean AM, Mosset A, Cottancin E, Baldeck PL, Kamada K, Parola S. Synthesis of PEGylated gold nanostars and bipyramids for intracellular uptake. NANOTECHNOLOGY 2012; 23:465602. [PMID: 23095344 DOI: 10.1088/0957-4484/23/46/465602] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A great number of works have focused their research on the synthesis, design and optical properties of gold nanoparticles for potential biological applications (bioimaging, biosensing). For this kind of application, sharp gold nanostructures appear to exhibit the more interesting features since their surface plasmon bands are very sensitive to the surrounding medium. In this paper, a complete study of PEGylated gold nanostars and PEGylated bipyramidal-like nanostructures is presented. The nanoparticles are prepared in high yield and their surfaces are covered with a biocompatible polymer. The photophysical properties of gold bipyramids and nanostars, in suspension, are correlated with the optical response of single and isolated objects. The resulting spectra of isolated gold nanoparticles are subsequently correlated to their geometrical structure by transmission electron microscopy. Finally, the PEGylated gold nanoparticles were incubated with melanoma B16-F10 cells. Dark-field microscopy showed that the biocompatible gold nanoparticles were easily internalized and most of them localized within the cells.
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88
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Kamada K, Ito Y, Kobayashi T. Human MCG measurements with a high-sensitivity potassium atomic magnetometer. Physiol Meas 2012; 33:1063-71. [PMID: 22621881 DOI: 10.1088/0967-3334/33/6/1063] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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89
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Bellier Q, Makarov NS, Bouit PA, Rigaut S, Kamada K, Feneyrou P, Berginc G, Maury O, Perry JW, Andraud C. Excited state absorption: a key phenomenon for the improvement of biphotonic based optical limiting at telecommunication wavelengths. Phys Chem Chem Phys 2012; 14:15299-307. [DOI: 10.1039/c2cp40779e] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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90
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Kamada K, Hara C, Ogawa K, Ohta K, Kobuke Y. Strong two-photon absorption and its saturation of a self-organized dimer of an ethynylene-linked porphyrin tandem. Chem Commun (Camb) 2012; 48:7988-90. [DOI: 10.1039/c2cc30879g] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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91
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Cho N, Zhou G, Kamada K, Kim RH, Ohta K, Jin SH, Müllen K, Lee KS. The impact of charge defects and resonance enhancement on the two-photon absorption activity of spirofluorene and ladder-type pentaphenylene derivatives. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm13481g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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92
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Yoshikawa A, Yanagida T, Yokota Y, Kamada K, Kawaguchi N, Fukuda K, Yamazaki A, Watanabe K, Uritani A, Iguchi T, Boulon G, Nikl M. Development of novel rare earth doped fluoride and oxide scintillators for two-dimensional imaging. J RARE EARTH 2011. [DOI: 10.1016/s1002-0721(10)60621-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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93
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Hanai Y, Rahman MJ, Yamakawa J, Takase M, Nishinaga T, Hasegawa M, Kamada K, Iyoda M. Cover Picture: Synthesis and Nanostructures of Cyclic Triphenylene Trimers Having Long Alkyl and Alkoxy Side-Chains (Chem. Asian J. 11/2011). Chem Asian J 2011. [DOI: 10.1002/asia.201190045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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94
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Nakano M, Fukui H, Minami T, Yoneda K, Shigeta Y, Kishi R, Champagne B, Botek E, Kubo T, Ohta K, Kamada K. Erratum to: (Hyper)polarizability density analysis for open-shell molecular systems based on natural orbitals and occupation numbers. Theor Chem Acc 2011. [DOI: 10.1007/s00214-011-1064-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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95
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Hanai Y, Rahman MJ, Yamakawa J, Takase M, Nishinaga T, Hasegawa M, Kamada K, Iyoda M. Synthesis and Nanostructures of Cyclic Triphenylene Trimers Having Long Alkyl and Alkoxy Side-Chains. Chem Asian J 2011; 6:2940-5. [DOI: 10.1002/asia.201100336] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Indexed: 12/24/2022]
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96
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Fukui H, Shigeta Y, Nakano M, Kubo T, Kamada K, Ohta K, Champagne B, Botek E. Enhancement of Second Hyperpolarizabilities in Open-Shell Singlet Slipped-Stack Dimers Composed of Square Planar Nickel Complexes Involving o-Semiquinonato Type Ligands. J Phys Chem A 2011; 115:1117-24. [PMID: 21247185 DOI: 10.1021/jp1073895] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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97
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Ohta K, Yamada S, Kamada K, Slepkov AD, Hegmann FA, Tykwinski RR, Shirtcliff LD, Haley MM, Sałek P, Gel’mukhanov F, Ågren H. Two-Photon Absorption Properties of Two-Dimensional π-Conjugated Chromophores: Combined Experimental and Theoretical Study. J Phys Chem A 2010; 115:105-17. [DOI: 10.1021/jp107044w] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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98
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Narita T, Takase M, Nishinaga T, Iyoda M, Kamada K, Ohta K. Inside Cover: Star-Shaped Oligothiophenes with Unique Photophysical Properties and Nanostructured Polymorphs (Chem. Eur. J. 40/2010). Chemistry 2010. [DOI: 10.1002/chem.201090199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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99
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Kamada K, Kunii N, Ota T, Kawai K, Saito N. S10-4 Spatial and temporal dynamics of language-related and face recognition brain functions by electrocorticogram and MEG. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60083-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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100
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Kamada K, Kawai K, Ota T, Kunii N, Saito N. S39-5 Visualization of the subcortical language fibers on tractography by co-utilizing functional MRI and MEG. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60246-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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