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Title: Mesoscale Frank–Kasper Crystal Structures from Dendron Assembly by Controlling Core Apex Interactions

Abstract

Single-component polymeric materials open up a great potential for self-assembly into mesoscale complex crystal structures that are known as Frank-Kasper (FK) phases. Predicting the packing structures of the soft-matter spheres, however, remains a challenge even when the molecular design is precisely known. Here, we investigate the role of the molecules' enthalpic interaction in determining the low-symmetry crystal structures. To this end, we synthesize architecturally asymmetric dendrons by varying their apex functionalities and examine the packing structures of the second-generation (G2) dendritic wedges. Our work shows that weakening the hydrogen bonding of the dendron apex makes the particles softer and smaller, and leads to the formation of various FK structures at lower temperatures, including the new observation of a FK C14 phase in the cone-shaped dendron systems. As a consequence of the free energy balance between the particle's interfacial tension and the chain's stretching, various packing structures are mainly tuned by designing the hydrogen bonding interaction.

Authors:
 [1];  [1];  [1];  [1];  [2]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [1]
  1. Yonsei Univ., Seoul (South Korea)
  2. Pohang Accelerator Lab. (PAL) (South Korea). Industry Technology Convergence Center
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Samsung Electronics; National Research Foundation of Korea (NRF)
OSTI Identifier:
1834774
Grant/Contract Number:  
AC02-06CH11357; 2021R1A2C2006588; 2020R1A2-C3004520; SRFC-MA1801-04
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 143; Journal Issue: 42; Journal ID: ISSN 0002-7863
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Jun, Taesuk, Park, Hyunjun, Jeon, Seungbae, Jo, Seungyun, Ahn, Hyungju, Jang, Woo-Dong, Lee, Byeongdu, and Ryu, Du Yeol. Mesoscale Frank–Kasper Crystal Structures from Dendron Assembly by Controlling Core Apex Interactions. United States: N. p., 2021. Web. doi:10.1021/jacs.1c07313.
Jun, Taesuk, Park, Hyunjun, Jeon, Seungbae, Jo, Seungyun, Ahn, Hyungju, Jang, Woo-Dong, Lee, Byeongdu, & Ryu, Du Yeol. Mesoscale Frank–Kasper Crystal Structures from Dendron Assembly by Controlling Core Apex Interactions. United States. https://doi.org/10.1021/jacs.1c07313
Jun, Taesuk, Park, Hyunjun, Jeon, Seungbae, Jo, Seungyun, Ahn, Hyungju, Jang, Woo-Dong, Lee, Byeongdu, and Ryu, Du Yeol. Fri . "Mesoscale Frank–Kasper Crystal Structures from Dendron Assembly by Controlling Core Apex Interactions". United States. https://doi.org/10.1021/jacs.1c07313. https://www.osti.gov/servlets/purl/1834774.
@article{osti_1834774,
title = {Mesoscale Frank–Kasper Crystal Structures from Dendron Assembly by Controlling Core Apex Interactions},
author = {Jun, Taesuk and Park, Hyunjun and Jeon, Seungbae and Jo, Seungyun and Ahn, Hyungju and Jang, Woo-Dong and Lee, Byeongdu and Ryu, Du Yeol},
abstractNote = {Single-component polymeric materials open up a great potential for self-assembly into mesoscale complex crystal structures that are known as Frank-Kasper (FK) phases. Predicting the packing structures of the soft-matter spheres, however, remains a challenge even when the molecular design is precisely known. Here, we investigate the role of the molecules' enthalpic interaction in determining the low-symmetry crystal structures. To this end, we synthesize architecturally asymmetric dendrons by varying their apex functionalities and examine the packing structures of the second-generation (G2) dendritic wedges. Our work shows that weakening the hydrogen bonding of the dendron apex makes the particles softer and smaller, and leads to the formation of various FK structures at lower temperatures, including the new observation of a FK C14 phase in the cone-shaped dendron systems. As a consequence of the free energy balance between the particle's interfacial tension and the chain's stretching, various packing structures are mainly tuned by designing the hydrogen bonding interaction.},
doi = {10.1021/jacs.1c07313},
journal = {Journal of the American Chemical Society},
number = 42,
volume = 143,
place = {United States},
year = {Fri Oct 15 00:00:00 EDT 2021},
month = {Fri Oct 15 00:00:00 EDT 2021}
}

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