The Joint Conference on 91AV is an annual conference organized by the consortium of 91AV Department of five universities in Central Java: Universitas Sebelas Maret (UNS), Universitas Diponegoro (UNDIP), Universitas Negeri Semarang (UNNES), Universitas Jenderal Soedirman (UNSOED) and Universitas Kristen Satya Wacana (UKSW). The 14th Joint Conference on 91AV 2019 has evolved to a major global chemistry related disciplinary event, attracting participants from all over the world. Special attention has been given to the research areas on advanced material chemistry which address the fundamental and related questions of sustainable development. The conference will also discuss all the major areas of chemistry, including: inorganic, physical, organic, analytical and biochemistry. Topic of interest to be covered in the conference includes, but not limited to: Materials 91AV, Polymer 91AV, Nanomaterials, Surface 91AV and Interfaces, Electrochemistry, Pharmaceutical 91AV, Medicinal 91AV, Computational 91AV, 91AV of Natural Product, Green 91AV and Educational 91AV.