Highly effective quenching of the ultrafast radiationless decay of photoexcited pyrimidine bases by covalent modification: photophysics of 5,6-trimethylenecytosine and 5,6-trimethyleneuracil
文献情報
Marek Z. Zgierski, Takashige Fujiwara, William G. Kofron, Edward C. Lim
5,6-Trimethylenecytosine (TMC) and 5,6-trimethyleneuracil (TMU), in which the twist of the C5–C6 bond (or the pyrimidalization of C5) is strongly hindered, do not exhibit the subpicosecond excited-state lifetime characteristic of the naturally occurring pyrimidine bases. This result demonstrates the important role the out-of-plane deformation of the six-membered ring plays in the ultrafast (subpicosecond) internal conversion of photoexcited nucleobases. The dramatically shorter fluorescence lifetime of TMU (∼30 ps) relative to TMC (∼1.2 ns), in aqueous solution at room temperature, is attributed to the presence in TMU of an efficient, secondary nonradiative decay channel of S1(ππ*) involving a low-lying 1nπ* state.
関連文献
Core cross-linked polyphosphoester micelles with folate-targeted and acid-cleavable features for pH-triggered drug delivery
Jian Hu, Jinlin He, Dongling Cao, Mingzu Zhang, Peihong Ni
DOI: 10.1039/C5PY00023H
pH-sensitive triblock copolymers for efficient siRNA encapsulation and delivery
Jian Qian
DOI: 10.1039/C5PY00219B
Poly(lactide)-block-poly(ε-caprolactone-co-ε-decalactone)-block-poly(lactide) copolymer elastomers
Deborah K. Schneiderman, Erin M. Hill, Mark T. Martello, Marc A. Hillmyer
DOI: 10.1039/C5PY00202H
Chemistry of aromatic polythioesters and polydithioesters
Daisuke Abe, Yuichiro Fukuda, Yuji Sasanuma
DOI: 10.1039/C4PY01702A
Electrochemical redox responsive supramolecular self-healing hydrogels based on host–guest interaction
Liao Peng, Huijuan Zhang, Anchao Feng, Meng Huo, Zilin Wang, Jin Hu, Weiping Gao, Jinying Yuan
DOI: 10.1039/C5PY00296F
A rational approach to activated polyacrylates and polymethacrylates by using a combination of model reactions and SET-LRP of hexafluoroisopropyl acrylate and methacrylate
Shampa R. Samanta, Ruilong Cai, Virgil Percec
DOI: 10.1039/C5PY00082C
Dual-stimuli sensitive keratin graft PHPMA as physiological trigger responsive drug carriers
Lijun Zhu, Hongliang Kang, Xiaozhong Qu, Ruigang Liu
DOI: 10.1039/C4PY01750A
Facile synthesis of photolabile dendritic-unit-bridged hyperbranched graft copolymers for stimuli-triggered topological transition and controlled release of Nile red
Bin Mo, Huanhuan Liu, Xiangdong Zhou, Youliang Zhao
DOI: 10.1039/C5PY00132C
こちらもおすすめ
1-{3-[5-(エチルカルボンイル)-2,4-ジメチル-1H-ピロロール-3-基]プロパニル}ピペリジン-4-カルボン酸について、適用される法規ガイドラインは何ですか?
この化合物はCAS番号1142209-81-1であり、GHS分類では corrosive (腐食性物質) と classified (分類物質) として指定され...
2,2-二氟-1,3-ベンゾジオキサン-5-カルボキシlic酸とは何ですか?
2,2-二氟-1,3-ベンゾジオキサン-5-カルボキシlic酸は、CAS番号656-46-2の化合物で、化学式はC8H4F2O4です。この化合物は白色の結晶性粉...
8-氯-4-色原酮の代替品はありますか?
8-氯-4-色原酮(CAS番号: 49701-11-3)の代替品には、他の色原酮類似物や、構造が似ている化合物があります。例えば、8-メチル-4-色原酮や、他の...
エチル6,6-ジメチル-4,5,6,7-テトラヒドロ-1H-インドアゼー-3-カルボキシレートとは何ですか?
エチル6,6-ジメチル-4,5,6,7-テトラヒドロ-1H-インドアゼー-3-カルボキシレートは、CAS番号1233243-56-5を有する化合物です。これは有...
4-叔丁基-6-氯-嘧啶に適用される法規ガイドラインは何ですか?
4-叔丁基-6-氯-嘧啶はCAS番号3435-24-3で、GHS分類では毒性物質とみなし、GHSの危険性分類が適用されます。REACH規則では登録が必要で、Eu...
維库溴铵杂质Bはどのように合成されますか?
維库溴铵杂质Bは、アンドロステンデンから始まり、一連の合成反応、包括的な選択性と高い収率で合成されます。具体的には、ブロミド化、酸化、ジマーゼ反応、アミド化など...
2-(4-氟苄基)-吡咯烷の物理化学的性質は何ですか?
CAS番号350017-04-8の2-(4-氟苄基)-吡咯烷は、結晶性の白色粉末です。分子量は199.17 g/molで、水に溶けにくいです。化学反応では比較的...
3-喹啉甲醛(2-チロール-8-エチル)は安全ですか?
3-喹啉甲醛(2-チロール-8-エチル)は一定の毒性を持つため、取扱には注意が必要です。使用する際は適切な防護具を着用し、密閉容器で保管・搬送し、直接的な接触を...
エチル3-(ヒドロキシメチル)-1H-ピロール-2-カルボキシレートはどのように保存すればよいですか?
エチル3-(ヒドロキシメチル)-1H-ピロール-2-カルボキシレートは、室温(25℃)以下で保存し、直射日光を避け、乾燥した環境で保管することが推奨されます。ま...
掲載誌
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.











![[2',6'-bis(propan-2-yloxy)-[1,1'-biphenyl]-3-yl]dicyclohexylphosphane structure [2',6'-bis(propan-2-yloxy)-[1,1'-biphenyl]-3-yl]dicyclohexylphosphane structure](https://static.chemtradehub.com/structs/787/787618-22-8-dda2.webp)


