ISGS eSeminar, February 2023


Can we design network structures of inorganic polymeric mate-rials like organic synthesis?


Masahide Takahashi

Department of Materials Science, Osaka Metropolitan University


The answer is “yes”! In this lecture, we will discuss how we can control the network structure of inorganic-based polymeric materials for the alternating oxo copolymers of well-defined network structures and their applications.

Many attempts have already been made to achieve inorganic-based poly-meric materials with designed network structure because most properties largely depend on it. However, it is not easy to do with conventional sol-gel approaches because of entropy driven processing. The sol-gel method is a molecular approach to preparing oxo-chains. Successive polymerization inherent in the method also makes it difficult to control the network struc-tures. Here I describe the preparation of organically-modified oxo-polymers with predetermined network structures. Solution processing of well designed systems enables us to prepare such alternating oxo copolymers. The main chain of the polymer is constituted of alternating oxo structures (for example, silicate-phosphate network) as shown in the figure below. A simple mixing of starting reagents results in the formation of complete al-ternating multicomponent networks through metathesis of acid-base pairs. The alternating oxo-copolymers obtained exhibit unique optical, electric, and mechanical properties depending on the type of oxo-units therein.

It is our pleasure to invite you to join the ISGS eSeminar for February 2023, which will be delivered by Professor Masahide Takahashi on Wednesday 8 February. Masahide will be familiar to members of the sol-gel community as the immediate Past – President of the ISGS and for the recent recognition of his career achievements as an ISGS Fellow. Please click here and here to learn more about his other achieve-ments and interesting career journey, including his contributions to both the professional and social fabric of our sol-gel and materials sci-ence community.

Date: Wednesday 8 February 2023


  • ZOOM (eSeminar link), Meeting ID: 307 291 6432 Passcode: M2yPE&48


  • 04:00 – Ottawa, USA, East Coast
  • 06:00 – Brazil (São Paulo) and Argentina
  • 09:00 – UTC
  • 09:00 – UK, Portugal
  • 10:00 – Germany, Central Europe, Sweden, Norway
  • 11:00 – Romania, Israel, Eastern Europe, Ukraine
  • 12:00 – Russia (Moscow, St Petersburg)
  • 17:00 – China, Singapore, Malaysia
  • 18:00 – Japan, Korea
  • 19:00 – Australia (East Coast)