合理的に設計されたフタロシアニンは,主な吸収帯域が1000 nmを超えている
Nagao Kobayashi1, Taniyuki Furuyama, Koh Satoh
1Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan. nagaok@m.tohoku.ac.jp
Journal of the American Chemical Society
|November 15, 2011
まとめ
1000 nmを超える吸収帯を持つ新しい空気安定のフタロシアニン (Pcs) が合成されました. これらの新しいPCは,強化されたスペクトル学的性質と重要な赤色シフトのためにメイングループ要素を使用します.
科学分野:
- 材料科学 材料科学とは
- 有機化学 オーガニック・ケミストリー
- スペクトル顕微鏡検査です.
背景:
- フタロシアニン (Pcs) は,多様な用途を持つ多用途のマクロサイクル化合物です.
- Pcsで拡張された近赤外線 (NIR) 吸収を達成することは,先進的な光学および電子機器にとって非常に重要です.
- Pcsの電子特性を調節するには,しばしば戦略的置換が必要です.
研究 の 目的:
- 主要吸収帯域が1000 nmを超える高度に空気安定性の高いフタロシアニンを合成する.
- フタロシアニンのスペクトル特性に対するメイングループ元素の影響を調査する.
- Q帯吸収における有意な赤色シフトの起源を理解するために.
主な方法:
- メイングループ要素を周辺および中央置換剤として使用した新しいフタロシアニン誘導体の合成.
- Q帯吸収に焦点を当てたスペクトロスコピーによる特徴付け.
- 境界軌道特性の分析と置換物の相乗効果.
主要な成果:
- Q帯のピークがそれぞれ1018nmと1033nmで,空気に安定したフタロシアニン[pcPOMe]と[pcPOMe]の合成が成功しました.
- 吸収帯が1000nmを超えて有意に広がっていることを実証する.
- 大赤色シフトは,グループ15とグループ16の元素の相乗効果に起因する.
結論:
- 拡張されたNIR吸収と高い空気安定性を有する新しいフタロシアニンが開発されました.
- メイングループ要素は,フタロシアニンの電子的および光学的性質を効果的に調節します.
- 組み込まれているメイングループ要素の相乗効果は,フタロシアニンの吸収における重要な赤色シフトを達成するための鍵です.
さらに関連する動画
08:51Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
Published on: October 24, 2017
11:26Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
Published on: September 12, 2014
関連する概念動画
01:32UV–Vis Spectroscopy of Conjugated Systems
Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in the...
One of the factors influencing λmax is the extent of conjugation in the...
01:11Channel Rhodopsins
Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
01:14Photoluminescence: Applications
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
02:00Photoreceptors and Plant Responses to Light
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
01:29The Photochemical Reaction Center
Reaction centers are pigment-protein complexes that initiate energy conversion from photons to chemical entities. Therefore, photochemical reaction center is a more appropriate term that describes these complexes. The Nobel laureates Robert Emerson and William Arnold provided the first experimental evidence of photochemical reaction centers by demonstrating the participation of nearly 2,500 chlorophyll molecules for the release of just one molecule of oxygen. Despite thousands of photosynthetic...
01:22Photoreceptors and Visual Pathways
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...