Erek-Erek 21 Gambar Buku Mimpi 2D 3D 4D & Kode Alam

2d 2121 Draw is an on learning munity where students of all skill levels can learn how to be a better artist. Our contributing artists and instructors are the best in the world.In this work, we introduce helical chirality into 2D COFs using confurationally stable enantiopure and racemic [5]helicenes as linkers in