Pure Appl. Chem., 2000, Vol. 72, No. 7, pp. 1207-1228
http://dx.doi.org/10.1351/pac200072071207
Synthetic pathways and processes in green chemistry. Introductory overview
Abstract:
Contents
- Green Chemistry in the International Context
- The Concept of green Chemistry
Definition of green chemistry | Green chemistry: Why now? | The historical context of green chemistry | The emergence of green chemistry - The Content of Green Chemistry
Areas of green chemistry | Preliminary remarks | Alternative feedstocks | Benign reagents/synthetic pathways | Synthetic transformations | Solvents/reaction conditions
Green Chemistry in the International Context
It has come to be recognized in recent years, that the science of chemistry
is central to addressing the problems facing the environment. Through
the utilization of the various subdisciplines of chemistry and the molecular
sciences, there is an increasing appreciation that the emerging area
of green chemistry1
is needed in the design and attainment of sustainable development. A
central driving force in this increasing awareness is that green chemistry
accomplishes both economic and environmental goals simultaneously through
the use of sound, fundamental scientific principles.
Recently, a basic strategy has been proposed for implementing the relationships
between industry and academia, and hence, funding of the research that
constitutes the engine of economic advancement; it is what many schools
of economics call the "triple bottom line" philosophy,
meaning that an enterprise will be economically sustainable if the objectives
of environmental protection, societal benefit, and market advantage
are all satisfied2.
Triple bottom line is a strong idea for evaluating the success of environmental
technologies. It is clear that the best environmentally friendly technology
or discovery will not impact on the market if it is not economically
advantageous; in the same way, the market that ignores environmental
needs and human involvement will not prosper. This is the challenge
for the future of the chemical industry, its development being strongly
linked to the extent to which environmental and human needs can be reconciled
with new ideas in fundamental research. On the other hand, it should
be easy to foresee that the success of environmentally friendly reactions,
products, and processes will improve competitiveness within the chemical
industry. If companies are able to meet the needs of society, people
will influence their own governments to foster those industries attempting
such environmental initiatives. Of course, fundamental research will
play a central role in achieving these worthy objectives. What we call
green chemistry may in fact embody some of the most advanced perspectives
and opportunities in chemical sciences.
It is for these reasons that the International Union of Pure and Applied
Chemistry (IUPAC) has a central role to play in advancing and promoting
the continuing emergence and impact of green chemistry. When we think
about how IUPAC furthers chemistry throughout the world, it is useful
to refer to IUPAC's Strategic Plan. This plan demonstrates the direct
relevance of the mission of IUPAC to green chemistry, and explains why
there is growing enthusiasm for the pursuit of this new area as an appropriate
activity of a scientific Union. The IUPAC Strategic Plan outlines among
other goals:
- IUPAC will serve as a scientific, international, nongovernmental body in objectively addressing global issues involving the chemical sciences. Where appropriate, IUPAC will represent the interests of chemistry in governmental and nongovernmental forums.
- IUPAC will provide tools (e.g., standardized nomenclature and methods) and forums to help advance international research in the chemical sciences.
- IUPAC will assist chemistry-related industry in its contributions to sustainable development, wealth creation, and improvement in the quality of life.
- IUPAC will facilitate the development of effective channels of communication in the international chemistry community.
- IUPAC will promote the service of chemistry to society in both developed and developing countries.
- IUPAC will utilize its global perspective to contribute toward the enhancement of education in chemistry and to advance the public understanding of chemistry and the scientific method.
- IUPAC will make special efforts to encourage the career development of young chemists.
- IUPAC will broaden the geographical base of the Union and ensure that its human capital is drawn from all segments of the world chemistry community.
- IUPAC will encourage worldwide dissemination of information about the activities of the Union.
- IUPAC will assure sound management of its resources to provide maximum value for the funds invested in the Union.
Through the vehicle of green chemistry, IUPAC can engage and is engaging
the international community in issues of global importance to the environment
and to industry, through education of young and established scientists,
the provision of technical tools, governmental engagement, communication
to the public and scientific communities, and the pursuit of sustainable
development. By virtue of its status as a leading and internationally
representative scientific body, IUPAC is able to collaborate closely
in furthering individual national efforts as well as those of multinational
entities.
An important example of such collaboration in the area of green chemistry
is that of IUPAC with the Organization for the Economical Cooperation
and Development (OECD) in the project on "Sustainable Chemistry", aimed
at promoting increased awareness of the subject in the member countries.
During a meeting of the Environment Directorate (Paris, 6 June 1999),
it was proposed that United States and Italy co-lead the activity, and
that implementation of five recommendations to the member countries
be accorded the highest priority, namely:
- research and development
- awards and recognition for work on sustainable chemistry
- exchange of technical information related to sustainable chemistry
- guidance on activities and tools to support sustainable chemistry programs
- sustainable chemistry education
These recommendations were perceived to have socio-economic implications
for worldwide implementation of sustainable chemistry. How IUPAC and,
in particular, its Divisions can contribute to this effort is under
discussion. IUPAC is recognized for its ability to act as the scientific
counterpart to OECD for all recommendations and activities. Although
the initiatives being developed by the OECD are aimed primarily at determining
the role that national institutions can play in facilitating the implementation
and impact of green chemistry, it is recognized that each of these initiatives
also has an important scientific component. Whether it is developing
criteria or providing technical assessment for awards and recognition,
identifying appropriate scientific areas for educational incorporation,
or providing scientific insight into the areas of need for fundamental
research and development, IUPAC can play and is beginning to play an
important role as an international scientific authority on green chemistry.
Other multinational organizations including, among others, the United
Nations, the European Union, and the Asian Pacific Economic Community,
are now beginning to assess the role that they can play in promoting
the implementation of green chemistry to meet environmental and economic
goals simultaneously. As an alternative to the traditional regulatory
framework often implemented as a unilateral strategy, multinational
governmental organizations are discovering that green chemistry as a
nonregulatory, science-based approach, provides opportunities for innovation
and economic development that are compatible with sustainable development.
In addition, individual nations have been extremely active in green
chemistry and provide plentiful examples of the successful utilization
of green chemistry technologies. There are rapidly growing activities
in government, industry, and academia in the United States, Italy, the
United Kingdom, the Netherlands, Spain, Germany, Japan, China, and many
other countries in Europe and Asia, that testify to the importance of
green chemistry to the future of the central science of chemistry around
the world.
Organizations and Commissions currently involved in programs in green
chemistry at the national or international level include, for example:
- U.S. Environmental Protection Agency (EPA), with the "Green Chemistry Program" which involves, among others, the National Science Foundation, the American Chemical Society, and the Green Chemistry Institute;
- European Directorate for R&D (DG Research), which included the goals of sustainable chemistry in the actions and research of the European Fifth Framework Programme;
- Interuniversity Consortium "Chemistry for the Environment", which groups about 30 Italian universities interested in environmentally benign chemistry and funds their research groups;
- UK Royal Society of Chemistry, which promotes the concept of green chemistry through a "UK Green Chemistry Network" and the scientific journal Green Chemistry;
- UNIDO-ICS (International Centre for Science and High Technology of the United Nations Industrial Development Organization) which is developing a global program on sustainable chemistry focusing on catalysis and cleaner technologies with particular attention to developing and emerging countries (the program is also connected with UNIDO network of centers for cleaner production); and
- Monash University, which is the first organization in Australia to undertake a green chemistry program.
Footnotes:
1. The terminology "green chemistry"
or "sustainable chemistry" is the subject of debate. The expressions
are intended to convey the same or very similar meanings, but each has
its supporters and detractors, since "green" is vividly evocative but
may assume an unintended political connotation, whereas "sustainable"
can be paraphrased as "chemistry for a sustainable environment", and
may be perceived as a less focused and less incisive description of
the discipline. Other terms have been proposed, such as "chemistry for
the environment" but this juxtaposition of keywords already embraces
many diversified fields involving the environment, and does not capture
the economic and social implications of sustainability. The Working
Party decided to adopt the term green chemistry for the purpose of this
overview. This decision does not imply official IUPAC endorsement for
the choice. In fact, the IUPAC Committee on Chemistry and Industry (COCI)
favors, and will continue to use sustainable chemistry to describe the
discipline.
2. J. Elkington, < http://www.sustainability.co.uk/sustainability.htm