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Noah Phipps added newpage_section_CD_subsection_CD1__.tex
about 7 years ago
Commit id: bd462ceb32db5f14434041fdb5b4ec407e1d51bd
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\newpage
\section{CD}
\subsection{CD1}
Colour is usually due to the presence of chemical compounds that interact with light (can be due to scattering/refraction etc.). The colouring of rocks is often due to transition metals.
\subsubsection{Carotenoids}
$\beta$-Carotene is a carotenoid, and gives an orange colour
\begin{itemize}
\item Present in leaves of all plants
\item Absorb solar energy, which is the transferred to chlorophyll
\item Light reflected lacks a certain wavelength
\end{itemize}
\subsubsection{Conjugated Systems}
\begin{itemize}
\item Carotenoids absorb visible light
\item Due to the presence of a conjugated system
\begin{itemize}
\item Long chain of alternate single and double bonds
\item Pi orbitals overlap
\item Delocalisation spreads over whole chain
\item Reduces energy gap between ground and excited state to visible range
\end{itemize}
\end{itemize}
