Two‐Dimensional Polymers

Abstract

The sections in this article are Introduction Why 2‐ D Polymers? What Is Not Considered a 2‐ D Polymer? General Considerations on Rational 2‐ D Polymer Synthesis Approaches to 2‐ D Polymers and Related Structures Thermolytic Synthesis Synthesis in the Flask Synthesis in 2‐ D Confinement Polymerization at Gas/Liquid and Liquid/Liquid Interfaces Polymerization in Layered Templates Polymerization in Layered Monomer Assemblies Polymerization on Solid Substrates Miscellaneous Conclusions and Outlook

Synthesis of a Covalent Monolayer Sheet by Photochemical Anthracene Dimerization at the Air/Water Interface and its Mechanical Characterization by AFM Indentation

“…This particularly holds when they are internally ordered and exhibit reasonable mechanical strength as individual sheet entities and thus, qualify as "2D Polymers" (2DPs). [ 2 ] Fields of applications that one can envisage [ 3 ] include chiral surfaces, [ 4 ] molecular electronics, [ 5,6 ] nanopatterning, [ 7 ] molecular landscaping, [ 8 ] acoustic sources, [ 9 ] chemiresistors, [ 10 ] nano-sieves, [ 11 ] hierarchical interactions, [ 12 ] stem-cell regulation, [ 13 ] phonontransport, [ 14 ] and molecular machines.[ 15 ] Ever since the fi rst polymerization experiments were conducted to obtain ultrathin fi lms at the air/water interface in 1930s, [ 16 ] numerous attempts were reported to create covalent monolayer sheets [ 1,[17][18][19][20] at air/ liquid and liquid/liquid interfaces as well as on solid substrates. While they led to intriguing developments and invaluable insights into the problems associated with approaching such synthetic targets, a key aspect remained unravelled: the longrange covalent order in the obtained sheets.…”