著者

JongTae Yoo SuHyun Lee Shinsuke Hirata ChaeRin Kim Chang Kee Lee Tomohiro Shiraki Naotoshi Nakashima Jin Kie Shim

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.44, no.4, pp.560-562, 2015-04-05 (Released:2015-04-05)

参考文献数

33

被引用文献数

25

---

We describe the in situ synthesis of the covalent organic framework-5 (COF-5) on the surfaces of carbon nanotubes (CNTs) and graphenes having homogeneous CNT@COF-5 core–shell structures using a sonochemical reaction in one pot. CNT@COF-5 was found to show better CO2 adsorption than the pristine COF-5.

著者

Ludmila Cojocaru Satoshi Uchida Yoshitaka Sanehira Jotaro Nakazaki Takaya Kubo Hiroshi Segawa

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.150068, (Released:2015-02-17)

被引用文献数

104

---

A compact TiO2 interlayer between FTO and perovskite in planar heterojunction perovskite solar cells is essential for effective charge extraction and minimized recombination. The electrical property of the interface of the perovskite layer with the compact TiO2 layer is thus important for achieving high power conversion efficiency in the perovskite solar cells. The motivation for the present study was to improve cell performance by improving the property of the TiO2/perovskite interface. Interestingly, a remarkable enhancement in cell efficiency was achieved by treatment of the compact TiO2 layer with TiCl4 and UV(O3).

著者

Yuta Sagara Katsuyuki Shizu Hiroyuki Tanaka Hiroshi Miyazaki Kenichi Goushi Hironori Kaji Chihaya Adachi

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.44, no.3, pp.360-362, 2015-03-05 (Released:2015-03-05)

参考文献数

25

被引用文献数

57

---

A strategy for designing highly efficient thermally activated delayed fluorescence (TADF) emitters was reported. TADF emitters with donor–acceptor–donor (D–A–D)-type structures showed highly efficient TADF because of their small singlet–triplet energy gap and large oscillator strength. An organic light-emitting diode containing a D–A–D-type TADF emitter, cis-BOX2, exhibited a high external electroluminescence quantum efficiency of 17.6%.

著者

Mika Aoki Daisuke Kawaguchi Tatsuya Ganbe Nobuyuki Sekine Kenji Okamoto Keiji Tanaka

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.150013, (Released:2015-02-25)

被引用文献数

1

---

We showed that a thermally stable europium complex can be used as a fluorescence probe to characterize glass transition behavior for polymers. This kind of simple but novel work opens many possibilities of measurements for physical properties of polymers at higher temperatures.

著者

Cui Zhang Yukari Oda Daisuke Kawaguchi Shokyoku Kanaoka Sadahito Aoshima Keiji Tanaka

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.44, no.2, pp.166-168, 2015-02-05 (Released:2015-02-05)

参考文献数

22

被引用文献数

10

---

We here show how a hydrophilic component can be stably partitioned to the film surface of multicomponent polymer systems using well-designed diblock copolymers.

著者

Yuki Sonoda Akari Hayashi Yasuto Minamida Junko Matsuda Etsuo Akiba

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.141202, (Released:2015-01-27)

被引用文献数

1

---

Nanostructures of porous carbon materials were controlled with a soft-template method for the purpose of expanding their applications. When 2,6-dihydropyridine hydrochloride, a nitrogen containing compound, was used as a carbon precursor in addition to resorcinol, larger pores over 50 nm appeared besides mesopores. The condition of such large pores being formed was examined in detail, and then acidity was found to a key factor for large pores rather than the presence of nitrogen atoms.

著者

Osvaldo N. Oliveira Jr. Tácito T. A. T. Neves Fernando V. Paulovich Maria Cristina F. de Oliveira

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.43, no.11, pp.1672-1679, 2014-11-05 (Released:2014-11-05)

参考文献数

46

被引用文献数

17

---

An overview is presented of the many opportunities and challenges for using “Big Data” concepts to treat data from chemical sensors. Issues discussed include the need to make data machine readable and how to integrate distinct types of data that can be acquired and stored in different places. As a concrete example of possible applications, we propose a framework for an expert system dedicated to clinical diagnosis, where data from various types of sensors can be combined with text to provide better-informed diagnostics.

著者

Hiromitsu Maeda Takuma Nishimura Akira Tsujii Kazuto Takaishi Masanobu Uchiyama Atsuya Muranaka

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.43, no.7, pp.1078-1080, 2014-07-05 (Released:2014-07-05)

参考文献数

26

被引用文献数

13

---

Various metal-bridged single and double helical complexes of π-conjugated ligand molecules, bidipyrrins, were prepared. The introduction of terminal end units enabled the formation of chiral single and double helices; their spectroscopic properties and temperature-dependent behaviors were examined.

著者

Satoru Ito Satoru Hiroto Hiroshi Shinokubo

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.43, no.8, pp.1309-1311, 2014-08-05 (Released:2014-08-05)

参考文献数

33

被引用文献数

4

---

We have developed a facile procedure for the synthesis of π-extended fluorubins from perylene bisimides. Iridium-catalyzed direct borylation, the Suzuki–Miyaura cross-coupling, and an acid-condensation sequence afforded π-extended fluorubins 1 in moderate yields. X-ray diffraction analysis revealed a planar structure of 1. In addition, optical analysis and DFT calculations indicated the presence of intramolecular charge-transfer interactions in 1c.

著者

Hiroaki Ozoe Chitoshi Kitamura Hiroyuki Kurata Jun-ich Nishida Takeshi Kawase

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.43, no.9, pp.1467-1469, 2014-09-05 (Released:2014-09-05)

参考文献数

32

被引用文献数

5

---

The title imides possessing a planar acenaphthofluoranthene moiety were prepared by the Diels–Alder reaction of diacenaphtho[1,2-b:1′,2′-d]thiophene and maleic anhydride and subsequent treatment with amines. The reaction with maleimide afforded the corresponding 1:2 adduct displaying intense blue fluorescence in solution. Although the imides crystallize yellow needles, their amorphous solids are red. Concentration-dependent 1H NMR spectra of a N-octyl derivative reveal self-aggregation behavior in CDCl3.

著者

Takashi Harada Ryo Hasegawa Katsura Nishiyama

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.43, no.9, pp.1496-1498, 2014-09-05 (Released:2014-09-05)

参考文献数

23

被引用文献数

6

---

A Ce3+ complex with tetradentate ligands based on benzimidazole moieties was synthesized. The photochemical properties of the Ce3+ complex were studied via absorption and emission spectra and emission quantum yield measurements. The effective values of the molar absorption coefficient and the emission quantum yield were estimated to be 890 dm3 mol−1 cm−1 and 0.58, respectively; these values are relatively large compared to those of common rare-earth metal complexes that exhibit 4f–4f emissions.

著者

ChaeRin Kim Tsuyohiko Fujigaya Naotoshi Nakashima

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.140663, (Released:2014-08-14)

被引用文献数

3

---

Gold (Au) nanoparticles having a Pt-shell layer (Au-Pt) deposited on a conductive support are a promising electrocatalyst for fuel cells for in order to minimize the use of Pt. We describe a facile one-pot method to grow Au-Pt having a 3.8-nm diameter on multi-walled carbon nanotubes (MWNTs) without using any reducing agent, in which polybenzimidazole was used as the binding sites on the MWNTs to load the Au-Pt.

著者

Takeshi Yatabe Takahiro Kikunaga Takahiro Matsumoto Hidetaka Nakai Ki-Seok Yoon Seiji Ogo

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.43, no.8, pp.1380-1382, 2014-08-05 (Released:2014-08-05)

参考文献数

22

被引用文献数

2

---

We report the synthesis of mononuclear nonheme manganese(V)–oxo complexes in aqueous acetonitrile solution from the reaction of manganese(III) complexes using hydrogen peroxide as an oxidant for the first time. A crystal structure of chloro derivative of manganese(V)–oxo complex and its reactivity toward 3,5-di-tert-butyl-catechol are also reported.

著者

Hans-Joachim Knölker

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.38, no.1, pp.8-13, 2009-01-05 (Released:2008-11-29)

参考文献数

93

被引用文献数

185

---

Highly convergent syntheses of substituted carbazoles are most conveniently achieved using organometallic chemistry. Construction of the carbazole framework via the iron-mediated route proceeds by a sequence of C–C and C–N bond formation. In the highly efficient palladium-catalyzed route the C–N bond is formed first followed by generation of the C–C bond. This article highlights some recent developments and applications to the total synthesis of biologically active carbazole alkaloids.

著者

Hiroshi Ohkuma Tetsuya Nakagawa Katsuyuki Shizu Takuma Yasuda Chihaya Adachi

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.43, no.7, pp.1017-1019, 2014-07-05 (Released:2014-07-05)

参考文献数

26

被引用文献数

63

---

A spiro compound DPAA-AF combining an electron-accepting diazafluorene unit and an electron-donating bis(diphenylamino)acridane unit has been synthesized and used as an emitter in organic light-emitting diodes. DPAA-AF exhibits efficient thermally activated delayed fluorescence, and a device based on this compound emits blue-greenish electroluminescence with a maximum external quantum efficiency of 9.6%.

著者

Ikuo Taniguchi Daichi Ioh Shigenori Fujikawa Takayuki Watanabe Yosuke Matsukuma Masaki Minemoto

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.140508, (Released:2014-07-01)

被引用文献数

6

---

CO2 capture with liquid amine scrubbing has received current acceptance, however, the energy intensive heating process in CO2 recovery has to look for an alternate effective CO2 separation methods. Condensation of CO2-trapping solutions by electrodialysis and successive CO2 recoverly under reduced pressure would decrease the required energy in the CO2 capture drastically. Energy calculations and basic experiments reveal that the required energy can be reduced to less than 2.0 GJ/t-CO2, which is about a half of the energy with aqueous monoethanol amine.

著者

Takao Sada Tsuyohiko Fujigaya Naotoshi Nakashima

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.140489, (Released:2014-06-06)

被引用文献数

1

---

The successful Layer-by-Layer assembly formation using a polyanion and trivalent ion, such as Fe3+, on the surfaces of the nanopores in an anodic aluminum oxide (AAO) membrane with a pore diameter of 35 nm is demonstrated.

著者

Masanori Fujii Naotoshi Nakashima Takuro Niidome Yasuro Niidome

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.43, no.1, pp.131-133, 2014-01-05 (Released:2014-01-05)

参考文献数

23

被引用文献数

13

---

Laser-induced desorption and ionization (LDI) of gold ions (Aun+: n = 1–3) were observed from gold nanorods in a liver tissue section (thickness: 10 µm). Larger amounts of gold nanorods produced stronger mass signals. Organic molecules in the tissue were not detected and did not inhibit the LDI processes of the gold nanorods in the tissue. Because of the selective LDI processes of the gold nanorods, the distribution of gold in the liver was successfully determined by imaging mass spectrometry.

著者

Hiroyuki Mieno Takuma Yasuda Yu Seok Yang Chihaya Adachi

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.43, no.3, pp.293-295, 2014-03-05 (Released:2014-03-05)

参考文献数

24

被引用文献数

10

---

Thienoacene-based π-conjugated oligomers, DTT-NP8 and DTT-BT8, were designed and synthesized. Their strong intermolecular interactions originating from S···S contacts enable the fabrication of single-crystal microribbons via solution processing. Organic single-crystal transistors exhibited field-effect mobilities as high as 0.54 cm2 V−1 s−1 and on/off current ratio of ca. 106.

著者

Yoshiaki Kuriu Akifumi Kawamura Tadashi Uragami Takashi Miyata

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.140103, (Released:2014-03-01)

被引用文献数

9

---

We prepared lectin-imprinted hydrogel layers on surface plasmon resonance (SPR) sensor chips by atom transfer radical polymerization (ATRP). In a buffer solution with a target protein, SPR signal and binding constant of the lectin-imprinted hydrogel layer chip were much larger than those of nonimprinted hydrogel layer chip prepared without using a template lectin. By molecular imprinting with ATRP, recognition sites for the target lectin were formed within hydrogel thin layers on the SPR sensor chips. The lectin-imprinted hydrogel layer chips with recognition sites for target protein are candidates as highly sensitive sensor devices for SPR sensing system.