This monograph shares a newly emerging point of view among researchers and students in the field of materials science. Inspired by the presence of precisely determined molecular-level sequence structures in a wide range of biomolecules, a growing number of synthetic compounds with the same structural feature are appearing day by day. These examples in the interdisciplinary areas of materials science are collected in this monograph to provide readers with a good understanding of the state-of-the-art accessible structural level, characteristic features, and future potentials of these types of compounds. The major target audience of this monograph include Ph.D. students and researchers who have just begun their careers, who are seeking novel research directions, ideas, and inspiration. Among the diverse examples of synthetic molecular sequences referred to in the monograph, experienced experts can also find work that is informative and relevant to their own research, making the book worthwhile reading for these specialists.