Enhancing DNA-Mediated Assemblies of Supramolecular Cage Dimers through Tuning Core Flexibility and DNA Length?A Combined Experimental?Modeling Study [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 632.4 Fungus diseases
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2015
• Mô tả vật lý: Size: p. 13381-13388 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 261062
• Chủ đề: 1. 60 applied life sciences; 2. Bio-inspired; 3. Catalysis (homogeneous); 4. Charge transport; 5. Et al; 6. Materials and chemistry by design; 7. Mesostructured materials; 8. Solar (photovoltaic); 9. Supramolecular structures and assemblies; 10. Synthesis (novel materials); 11. Synthesis (self-assembly)

Tóm tắt

 We report two complementary small-molecule?DNA hybrid (SMDH) building blocks have been combined to form well-defined supramolecular cage dimers at DNA concentrations as high as 102 ?M. This was made possible by combining a flexible small-molecule core and three DNA arms of moderate lengths (<
 20 base pairs). These results were successfully modeled by coarse-grained molecular dynamics simulations, which also revealed that the formation of illdefined networks in the case of longer DNA arms can be significantly biased by the presence of deep kinetic traps. Notably, melting point studies revealed that cooperative melting behavior can be used as a means to distinguish the relative propensities for dimer versus network formation from complementary flexible three-DNA-arm SMDH (fSMDH<
 sub>
 3<
 /sub>
 ) components: sharp, enhanced melting transitions were observed for assemblies that result mostly in cage dimers, while no cooperative melting behavior was observed for assemblies that form ill-defined networks.