The Department of Chemistry Education, Faculty of Mathematics and Natural Sciences, UNY has held an online Webinar Series #6 on Saturday, October 16, 2021. This activity was attended by a number of 126 participants from among lecturers, teachers, students, etc. There were two resource persons who were invited to fill the webinar series #6, namely Dr. Wan Haslinda Wan Ahmad (STEM Chemistry Education - Universiti Pendidikan Sultan Idris, Malaysia) and Dr. Noorshida Mohd Ali (Inorganic Chemistry - Sultan Idris Education University, Malaysia).

The first presentation was delivered by Dr. Wan Haslinda Wan Ahmad. He discussed Chemistry Jigsaw Puzzle – 21st Century Chemistry Learning Innovation. In his presentation, Dr. Haslinda said that basically chemistry involves and explains chemical reactions at macroscopic, sub-microscopic, and symbolic levels. Based on various literatures, it has been proven that chemistry is one of the most difficult chemistry subjects because of its abstract content. However, the learning activities carried out are often only limited to remembering and memorizing concepts, not understanding concepts. Aiming to overcome this problem, several previous researchers have proven that the use of puzzle games can improve students' understanding of chemistry. The use of puzzles in chemistry learning makes learning activities more fun, can recall previous knowledge, think logically, and improve higher-order thinking skills. Therefore, Dr. Haslinda developed the Chemistry Jigsaw Puzzle (CJP) which became an innovation in learning media with a game-based learning approach and involving chemical equations. This CJP development idea is based on a monopoly game. CJP involves 163 questions which are divided into 8 chapters of chemistry subjects and arranged for 11 levels and can be played by at least 2 people. The results showed that CJP: (1) supports the initiative to use STEM education, (2) supports the characteristics of 21st century learning, (3) applies cooperative learning strategies, (4) improves students' intrapersonal skills, and (5) increases students' intrinsic interest and motivation. to chemistry subjects.

The presentation was continued by Dr. Noorshida Mohd Ali who conveyed about Iridium(II) Complexes: Synthesis and Luminescent Properties. The cyclometalated iridium(III) complex has many photophysical and photochemical characteristics. Phosphorescent complexes have one metal and one or more ligands represented by a mixture of singlet-triplet states. The main problem solved in Dr. Noorshida because until now designing a green phosphorescent and a red emitter is a significant achievement but developing and innovating for higher efficiency and producing blue emissions is a challenge that must be done. Therefore, the research conducted by Dr. Noorshida is developing a caltonic polypyridyl complex from Iridium(III) by replacing one of the phenylpyridine ligands with an N-heterocyclic carbene ligand.

Through this webinar series #6, it is hoped that it will contribute to increasing the insight of participants from among lecturers, students, and teachers.