{'fraction_non_alphanumeric': 0.024745269286754003, 'fraction_numerical': 0.0, 'mean_word_length': 5.679611650485437, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Spontaneous self-assembly of a mono-component polyimide bearing terminal hydrogen-bonding sites in a single solvent.

A unique example of macromolecular self-assembly, where a mono-component homopolyimide bearing carboxy end-groups spontaneously forms nanopartilces with novel dimple-like morphology in a single good solvent, is presented. The self-assembly process is dramatically affected by the solution concentration and the temperature. It is proposed that such an unexpected self-assembly behavior is a synergistic result of the self-complementary hydrogen bonding between carboxy end-groups and the propensity to parallel packing of polyimide chains through aromatic interactions.