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Journal Articles

M$"o$ssbauer and magnetic study of neptunyl(+1) complexes

Nakamoto, Tadahiro*; Nakamura, Akio; Takeda, Masuo*

M$"o$ssbauer Spectroscopy; Applications in Chemistry, Biology, and Nanotechnology, p.95 - 114, 2013/10

https://doi.org/10.1002/9781118714614.ch05

Journal Articles

Molecular magnetism in neptunyl(+1,+2) complexes; $$^{237}$$Np-M$"o$ssbauer and magnetic study

Nakamura, Akio; Nakada, Masami; Nakamoto, Tadahiro*; Kitazawa, Takafumi*; Takeda, Masuo*

Journal of Alloys and Compounds, 444-445, p.621 - 633, 2007/10

https://doi.org/10.1016/j.jallcom.2006.12.062
 Times Cited Count：3 Percentile：28.09(Chemistry, Physical)

no abstracts in English

Journal Articles

Magnetic property of neptunyl (+2) complex NpO$$_{2}$$(C$$_{6}$$H$$_{7}$$O$$_{2}$$)$$_{2}$$(C$$_{5}$$H$$_{5}$$N)

Nakamura, Akio; Nakada, Masami; Nakamoto, Tadahiro*; Kitazawa, Takafumi*; Takeda, Masuo*

Journal of Magnetism and Magnetic Materials, 310(2, Part2), p.1447 - 1449, 2007/03

Magnetic property of a nitrogen (N)-coordinated neptunyl (+2) (Np(VI)) complex. 1 NpO$$_{2}$$(acac)$$_{2}$$(py) (acac=C$$_{6}$$H$$_{7}$$O$$_{2}$$, py=C$$_{5}$$H$$_{5}$$N) was studied by DC magnetization (M) measurements. While previous $$^{237}$$Np M$"o$ssbauer data of 1 exhibited para magnetic-relaxation spectra similar to other oxo-neptunyls (+1,+2), the DC-$$M$$ data have revealed many strikingly different features of 1 from the latter: first, its reciprocal susceptibility ($$chi$$$$^{-1}$$) vs. $$T$$(K) plots showed a peculiar strongly field ($$H$$)-dependent nonparamagnetic behavior, which suggests the presence of small ferromagnetic component with $$T$$$$_{C}$$$$>$$300 K. In addition, its low-temperature isothermal $$M$$ exhibited anomalous relaxation behavior involving initial over-responsive $$M$$ change and subs equent drift back to its "equilibrium" value ($$M$$$$_{rm eq}$$). Moreover, such $$M$$$$_{rm eq}$$ showed strong perturbation effect from the SQUID-$$M$$ measurement itself. Such novel magnetic features suggest the presence of a largely metastable fluctuating magnetic (spin plus orbital) state in 1 as a collective body of individual Ising-type neptunyl (O=Np=O)$$^{+2}$$ molecular magnets.

Journal Articles

Molecular magnetism of neptunyl (+2) complex NpO$$_{2}$$(C$$_{6}$$H$$_{7}$$O$$_{2}$$)$$_{2}$$(C$$_{5}$$H$$_{5}$$N)

Nakamura, Akio; Nakada, Masami; Nakamoto, Tadahiro*; Kitazawa, Takafumi*; Takeda, Masuo*

Journal of the Physical Society of Japan, 75(Suppl.), p.146 - 148, 2006/08

no abstracts in English

Journal Articles

Magnetic properties of some neptunyl(+1) complexes

Nakamoto, Tadahiro*; Nakada, Masami; Nakamura, Akio

Journal of Nuclear Science and Technology, 39(Suppl.3), p.102 - 105, 2002/11

http://www.tandfonline.com/doi/abs/10.1080/00223131.2002.10875418

no abstracts in English

Journal Articles

Magnetic study of pentavalent neptunium phthalate hexahydrate (NpO$$_{2}$$)$$_{2}$$(O$$_{2}$$C)$$_{2}$$C$$_{6}$$H$$_{4}$$$$cdot$$6H$$_{2}$$O

Nakamoto, Tadahiro; Nakada, Masami; Nakamura, Akio

Solid State Communications, 119(8-9), p.523 - 526, 2001/08

https://doi.org/10.1016/S0038-1098(01)00275-7
 Times Cited Count：10 Percentile：50.75(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Magnetic properties of neptunyl(+1) compounds

Nakamoto, Tadahiro; Nakada, Masami; Nakamura, Akio

Recent Research Developments in Inorganic Chemistry, 2, p.145 - 163, 2000/00

no abstracts in English

Journal Articles

A Correlation between isomer shifts of $$^{237}$$Np Moessbauer spectra and coordination numbers of Np atoms in neptunyl(V) compounds

Saeki, Masakatsu; Nakada, Masami; Nakamoto, Tadahiro*; Yamashita, Toshiyuki; ; Krot, N. N.*

Journal of Radioanalytical and Nuclear Chemistry, 239(2), p.221 - 225, 1999/00

https://doi.org/10.1007/BF02349486
 Times Cited Count：7 Percentile：49.7(Chemistry, Analytical)

no abstracts in English

Journal Articles

Coordination chemistry of neptunyl(V) compounds by means of Moessbauer spectroscopy

Saeki, Masakatsu; Nakada, Masami; Nakamoto, Tadahiro*; ; Yamashita, Toshiyuki

Journal of Alloys and Compounds, 271-273, p.176 - 179, 1998/00

https://doi.org/10.1016/S0925-8388(98)00049-8
 Times Cited Count：4 Percentile：39.22(Chemistry, Physical)

no abstracts in English

Journal Articles

$$^{237}$$Np Moessbauer spectroscopic study on pentavalent neptunium glycolate complex

Nakamoto, Tadahiro*; Nakada, Masami; ; Saeki, Masakatsu; Yamashita, Toshiyuki

Journal of Radioanalytical and Nuclear Chemistry, 227(1-2), p.137 - 141, 1998/00

https://doi.org/10.1007/BF02386446
 Times Cited Count：2 Percentile：38.16(Chemistry, Analytical)

no abstracts in English

Journal Articles

Synthesis and properties of some neptunyl(V) phthalates

Saeki, Masakatsu; Nakada, Masami; Yamashita, Toshiyuki; Nakamoto, Tadahiro*; Krot, N. N.*

Radiochimica Acta, 80(2), p.89 - 94, 1998/00

https://doi.org/10.1524/ract.1998.80.2.89

no abstracts in English

11 (Records 1-11 displayed on this page)
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