Water, the most important chemical for us, deserves its own episode describing the history of how chemists understand it. We start with pre-Enlightenment views of water as an element, then as a compound, then how electricity affected our understanding, then with dissolved salts, the crystal structure of ice, water's actual molecular structure, and how hydrogen bonding affects it.

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We start with a 1927 patent awarded to George Washington Carver, an agricultural chemist, for a locally-sourced Prussian blue. We learn a bit about Carver's life, education, and hobby of painting which may have led to the patent. We examine the patent in some detail, and then hear how it's been revived by a modern artist. Then we discuss other blue pigments throughout history, ending with the newest blue, an accidental discovery in a laboratory in 2009.

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• Support my podcast at https://www.patreon.com/thehistoryofchemistry
• Tell me how your life relates to chemistry! E-mail me at [email protected]
• Get my book, O Mg! How Chemistry Came to Be, from World Scientific Publishing, https://www.worldscientific.com/worldscibooks/10.1142/12670#t=aboutBook

In which we discuss the history of scientists attempting to determine a half-life of a specific radioactive isotope of samarium, and why that determination is so important for other branches of science. We learn of the poor quality of the observation, how at least one result was retracted, and how a new way to measure half-lives offers hope for a resolution to this problem.

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• Support my podcast at https://www.patreon.com/thehistoryofchemistry
• Tell me how your life relates to chemistry! E-mail me at [email protected]
• Get my book, O Mg! How Chemistry Came to Be, from World Scientific Publishing, https://www.worldscientific.com/worldscibooks/10.1142/12670#t=aboutBook

This is a brief history of how chemists understand the way liquids wet things. The first glimpse was by Francis Hauksbee in the early 1700s, and how water rises in narrow tubes. Through the 18th century, natural philosophers described surface tension. The 19th century brought understanding of wetting via macroscopic observations and descriptions. The 20th century added insights of quantum mechanics and the influence of surface roughness. Finally we discuss the 20th-century observation of superhydrophobicity, both natural and eventually artificial.

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• Support my podcast at https://www.patreon.com/thehistoryofchemistry
• Tell me how your life relates to chemistry! E-mail me at [email protected]
• Get my book, O Mg! How Chemistry Came to Be, from World Scientific Publishing, https://www.worldscientific.com/worldscibooks/10.1142/12670#t=aboutBook

In which we talk about the history of fractals and how they relate to chemistry. There is a brief overview of what a fractal is and how it developed in mathematics. Then we talk of how fractals apply to chemistry, including surface reactions, descriptions of molecular structures both artificial and natural, growth of polymers, and even how the concentrations and flows of minerals in streams follow a fractal variation with time.

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• Support my podcast at https://www.patreon.com/thehistoryofchemistry
• Tell me how your life relates to chemistry! E-mail me at [email protected]
• Get my book, O Mg! How Chemistry Came to Be, from World Scientific Publishing, https://www.worldscientific.com/worldscibooks/10.1142/12670#t=aboutBook

It's an ancient story, but fossils have been with us since time immemorial. In this episode, we hear about the history of chemists and their interpretation of fossils. Scientists first began considering fossils as evidence of past life in the 17th century. We hear about the fossil record, and the oldest fossils, then the oldest fossils with organic matter preserved, and the chemical controversy over how collagen can remain for millions of years.

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• Support my podcast at https://www.patreon.com/thehistoryofchemistry
• Tell me how your life relates to chemistry! E-mail me at [email protected]
• Get my book, O Mg! How Chemistry Came to Be, from World Scientific Publishing, https://www.worldscientific.com/worldscibooks/10.1142/12670#t=aboutBook

Refrigeration always has been closely intertwined with chemistry. In this episode we explore the history of refrigerants, from the first hints of artificial cooling in the mid-1700s, through the invention of the first practical refrigerator 8 decades later. We talk about a variety of refrigerants through the 20th century. Finally we examine some other newer or less-common methods of cooling.

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• Support my podcast at https://www.patreon.com/thehistoryofchemistry
• Tell me how your life relates to chemistry! E-mail me at [email protected]
• Get my book, O Mg! How Chemistry Came to Be, from World Scientific Publishing, https://www.worldscientific.com/worldscibooks/10.1142/12670#t=aboutBook

Magnetic tape was an integral part of the new, growing recording industry. Herein we talk about the chemical history of magnetic recording, from the first idea in 1888, onward. We encounter Poulsen, Pfleumer, Stille, Nagai, Mullin, and an array of corporations as well. Finally we discuss a bit about digital computers and the history of magnetic tapes for data.

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• Support my podcast at https://www.patreon.com/thehistoryofchemistry
• Tell me how your life relates to chemistry! E-mail me at [email protected]
• Get my book, O Mg! How Chemistry Came to Be, from World Scientific Publishing, https://www.worldscientific.com/worldscibooks/10.1142/12670#t=aboutBook

Here we talk about supersized sandwich compounds and their history, beginning with ferrocene in the 1950s. We go from single-decker to double-, triple, and quadruple-decker sandwich compounds through the 1970s and 1980s, a variety of "breads" and "fillings," and then even bigger as we move to the 21st Century.

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• Support my podcast at https://www.patreon.com/thehistoryofchemistry
• Tell me how your life relates to chemistry! E-mail me at [email protected]
• Get my book, O Mg! How Chemistry Came to Be, from World Scientific Publishing, https://www.worldscientific.com/worldscibooks/10.1142/12670#t=aboutBook

Herein we examine the cubical hydrocarbon, cubane, and its role in chemical history. We talk of difficulties in synthesis, possible uses as an explosive, its use as an isostere to benzene in medicinal compounds, and polymers of cubane. Patreon supporters can download a supplemental sheet to see some of the molecular structures I discuss.

Support the show

• Support my podcast at https://www.patreon.com/thehistoryofchemistry
• Tell me how your life relates to chemistry! E-mail me at [email protected]
• Get my book, O Mg! How Chemistry Came to Be, from World Scientific Publishing, https://www.worldscientific.com/worldscibooks/10.1142/12670#t=aboutBook