Tuning charge-assisted and weak hydrogen bonds in molecular complexes of the proton sponge DMAN by acid co-former substitution

Tuning charge-assisted and weak hydrogen bonds in molecular complexes of the proton sponge DMAN by acid co-former substitution
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通过酸共形成体取代调节质子海绵 DMAN 分子复合物中的电荷辅助氢键和弱氢键

DOI:
10.1039/c8ce00443a
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发表时间:
2018
期刊:
影响因子:
3.1
通讯作者:
Saunders L
Saunders L
中科院分区:
化学3区
文献类型:
--
作者:
Saunders L

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9个新的分子配合物的质子海绵1,8-双(二甲氨基)萘(DMAN)与取代的苯甲酸共形成者已被设计与不同的组分化学计量(1:1,1:2或1:3)。      这些复合物在性质上都是离子的,在酸共形成物和DMAN之间进行质子转移;在所有情况下,提取的质子都被DMAN保持在分子内[N-H N]+氢键中。许多结构特征是共同的所有配合物,并发现是可调的,在一个可预测的方式使用系统的酸共形成取代。这些特征包括与复杂化学计量一致的氢键基序中的酸共形成物之间形成的电荷辅助氢键,以及促进DMAN和酸共形成物组分的晶体堆积成规则基序的弱氢键。通过共形成物取代可能的晶体结构调整可以帮助这些材料的合理设计,提供可能受这些相互作用影响的目标固态性质的潜力。
Nine new molecular complexes of the proton sponge 1,8-bis(dimethylamino)naphthalene (DMAN) with substituted benzoic acid co-formers have been engineered with varying component stoichiometries (1 : 1, 1 : 2 or 1 : 3). These complexes are all ionic in nature, following proton transfer between the acid co-former and DMAN; the extracted proton is held by DMAN in all instances in an intramolecular [N–H⋯N]+ hydrogen bond. A number of structural features are common to all complexes and are found to be tunable in a predictable way using systematic acid co-former substitution. These features include charge-assisted hydrogen bonds formed between acid co-formers in hydrogen bonding motifs consistent with complex stoichiometry, and weak hydrogen bonds which facilitate the crystal packing of DMAN and acid co-former components into a regular motif. Possible crystal structure tuning by co-former substitution can aid the rational design of such materials, offering the potential to target solid-state properties that may be influenced by these interactions.
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