Open access peer-reviewed chapter

Introductory Chapter: Concepts in Textbook and a Study on Schiff Base Metal Complexes

By Takashiro Akitsu

Reviewed: September 26th 2018Published: November 5th 2018

DOI: 10.5772/intechopen.81684

Downloaded: 474

1. Introduction

The reason to propose the concept of this book is that some graduate students could not think their own researches in laboratory with related things learned in undergraduate textbooks. In order to overcome this issue, chapters in this book mention basic things of inorganic chemistry as well as frontier research topics on purpose.

In a conference [1], for example, we have recently reported the results of Z-scan NLO measurements for the analogous achiral organic ligands and metal complexes shown in Figure 1. As a promising renewable energy, a dye-sensitized solar cell (DSSC) is developing to improve performance of each materials and systems. From the view point of dye of metal complexes (or extended organic compounds), we have reported chiral Schiff base (salen-type) metal complexes. Induced CD from chiral Schiff base metal complexes containing azo-group has been also investigated for Au or TiO2 nanoparticles using their optical interaction so far.

Figure 1.

(a) Molecular structure, (b) simulated UV-vis spectrum (DFT), (c) IR spectrum, and (d) diffuse reflectance UV-vis spectrum of a Schiff base Cu(II) complex.

Probably, the disagreement between researches and textbook may come from deviation (explained in brackets) from typical cases of definition (description) of terms (bold fonts). In this case, related things in basic inorganic chemistry are as follows:

Four-coordinated complexes (coordination numbers): A complex of four-coordinated coordination structure adopts two structures, tetrahedral type and square planar type. In tetrahedral type, metal atoms are steric repulsion such as large ligand is larger than electron factor (The complex in Figure 1 is a square planar one having chelate ligand.)

Multidentate (chelate) ligands: Ligands in which two or more atoms can simultaneously form two electrons (lone-pair) donor bonding to the same metal ion are called “multidentate” ligands in contrast to monodentate ligand. These ligands are also called as “chelate” ligands and include bidentate, tridentate, tetradentate, etc. and various coordination sites. For example, ethylenediamine has (N,N) coordination atoms (The complex in Figure 1 has a tetradentate (N,N,O,O) Schiff base ligand.)

Electronic spectra (d-d transition): In order for the electronic state of a molecule to cause optical transition between d orbitals, the following “selection rule” exists. The d-d transitions occurring according to the selection rule are called allowed transitions, and the rest ones are called forbidden transitions. However, even for forbidden transitions, transitions may occur due to perturbation by vibration modes within the molecule. In Figure 1, UV-vis and IR spectra are exhibited. However, the intense bands in UV-vis spectrum are π-π* band due to organic ligands.

In this way, it is a wish of the editor to master basic concepts [2] in advanced researches [3, 4, 5] mainly for graduate students.

© 2018 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution 3.0 License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

How to cite and reference

Link to this chapter Copy to clipboard

Cite this chapter Copy to clipboard

Takashiro Akitsu (November 5th 2018). Introductory Chapter: Concepts in Textbook and a Study on Schiff Base Metal Complexes, Basic Concepts Viewed from Frontier in Inorganic Coordination Chemistry, Takashiro Akitsu, IntechOpen, DOI: 10.5772/intechopen.81684. Available from:

chapter statistics

474total chapter downloads

More statistics for editors and authors

Login to your personal dashboard for more detailed statistics on your publications.

Access personal reporting

Related Content

This Book

Next chapter

Modern Techniques in Synthesis of Organometallic Compounds of Germanium

By Hina Hayat and Muhammad Adnan Iqbal

Related Book

First chapter

Nanoformulation as a Tool for Improve the Pharmacological Profile of Platinum and Ruthenium Anticancer Drugs

By Valentina Uivarosi, Rodica Olar and Mihaela Badea

We are IntechOpen, the world's leading publisher of Open Access books. Built by scientists, for scientists. Our readership spans scientists, professors, researchers, librarians, and students, as well as business professionals. We share our knowledge and peer-reveiwed research papers with libraries, scientific and engineering societies, and also work with corporate R&D departments and government entities.

More About Us