短波赤外線で結合を断ち切る: 900-1500 nm NIR-II ウィンドウで2フォトンの活性化のためのBODIPYフォトケージ
Yagmur Aydogan-Sun1, Alexandra Egyed2, Arthur H Winter2
1Institute of Physical and Theoretical Chemistry, Goethe-University Frankfurt, Frankfurt am Main 60438, Germany.
Journal of the American Chemical Society
|July 28, 2025
まとめ
研究者らは,近赤外線II (NIR-II) ウィンドウで2フォトン刺激 (2PE) を使用して深層組織イメージングのための新しいフォトケージを開発しました. このBODIPYベースの分子は 生物学的アプリケーションで効率的な光触発式貨物放出を可能にします
科学分野:
- 写真化学
- 有機化学
- バイオテクノロジー
背景:
- フォトケージは,光の誘発による貨物の放出を可能にするが,紫外線/可視刺激波長によって制限され,深層組織への浸透を阻害する.
- 2フォトン刺激 (2PE) は,近赤外線 (NIR) または短波赤外線 (SWIR) の活性化を可能にし,組織の透明性を改善します.
- 第二の生物学的ウィンドウ (1000~1350 nm) のフォトケージングは未熟のままである.
研究 の 目的:
- NIR-IIウィンドウアプリケーションのためのBODIPYフォトケージの2フォトン吸収 (2PA) 性質を調査する.
- 900~1500 nmの範囲で2PAを強化する構造的変更を特定する.
- 生物画像と薬物投与のための効率的な2P活性化フォトアクチュエータを開発する.
主な方法:
- 3 と 5 の位置で異なる置換を持つ 11 つの BODIPY フォトケージを合成し,特徴づけました.
- 900~1500 nmの範囲で測定された2フォトン吸収 (2PA) 断面 (δ).
- 選択された化合物に対するクォンタム収量と作用横断 (δΦu) を評価した.
主要な成果:
- 強い電荷移転と振動の自由度の増加は2PAを大幅に強化します.
- 高い2PA断面を達成した: 900 nmで4000 GM (bis(styryl) -BODIPY) と1240 nmで1110 GM (monostyryl アナログ).
- 900 nmで最大5.8 GM,1300~1400 nmで最大1 GMの解鎖作用を持つ合成B-メチル化アナログ.
結論:
- NIR-IIウィンドウで効率的な2Pアクティベーション可能なフォトアクチュエータの主要な設計原理が特定されました.
- BODIPYフォトケージは,SWIRでトリガーされた貨物を最小のエネルギーで解放するために設計できます.
- これらの発見は 組織に深く浸透し 精密な光制御を必要とする 進化した生物学的応用への道を開きます
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