Johnson, Kristen N.; Hurlock, Matthew J.; Zhang, Qiang; Hipps, K. W.; Mazur, Ursula published the artcile< Balancing Noncovalent Interactions in the Self-Assembly of Nonplanar Aromatic Carboxylic Acid MOF Linkers at the Solution/Solid Interface: HOPG vs. Au(111)>, COA of Formula: C26H18Br2, the main research area is tetraphenylethene tetracarboxylic acid self assembly MOF solution solid interface.
This study explores directed noncovalent bonding in the self-assembly of nonplanar aromatic carboxylic acids on Au and graphite surfaces. It is the 1st step in developing a new design strategy to create 2-dimensional surface metal-organic frameworks (SURFMOFs). The acid mols. used are tetraphenylethene-based and are typically employed in the synthesis of 3-dimensional (3D) MOF crystalline solids. They include tetraphenylethene tetracarboxylic acid, tetraphenylethene bisphenyl carboxylic acid, and tetraphenylethene tetrakis-Ph carboxylic acid. The 2-dimensional structures formed from these mols. on highly ordered pyrolytic graphite (HOPG) and Au(111) are studied by scanning tunneling microscopy in a solution environment. The process of monolayer formation and final surface linker structures are strongly dependent on the combination of the mol. and substrate used and are discussed in terms of intermol. and mol.-substrate interactions, bonding geometry, and symmetry of the acid mols. In the case of linker self-assembly on HOPG, the mol.-substrate interactions play a significant role in the resulting surface structure. When the acid mols. are adsorbed on Au(111), the intermol. interactions tend to dominate over the weaker mol.-substrate bonding. Addnl., the interplay of π-π interactions and hydrogen bonding that directs the surface self-assembly on different supports can be modified by varying the linker concentration This is particularly applicable for the case of the acid mols. adsorbing on the Au(111) substrate. Precise control over predesigned surface structures and orientation of the nonplanar aromatic carboxylic linkers open up an exciting prospect for manipulating the direction of SURFMOF growth in 2 dimensions and potentially in 3D.
Langmuir published new progress about Aromatic carboxylic acids Role: RCT (Reactant), RACT (Reactant or Reagent). 184239-35-8 belongs to class bromides-buliding-blocks, and the molecular formula is C26H18Br2, COA of Formula: C26H18Br2.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary